diff --git a/module/convert/control.php b/module/convert/control.php
index 5559843706..73edcde6da 100644
--- a/module/convert/control.php
+++ b/module/convert/control.php
@@ -11,7 +11,12 @@
  */
 class convert extends control
 {
-    /* 安装程序首页。*/
+    /**
+     * Index page of convert.
+     * 
+     * @access public
+     * @return void
+     */
     public function index()
     {
         $this->convert->saveState();
@@ -19,14 +24,26 @@ class convert extends control
         $this->display();
     }
 
-    /* 选择系统。*/
+    /**
+     * Select the source system.
+     * 
+     * @access public
+     * @return void
+     */
     public function selectSource()
     {
         $this->view->header->title = $this->lang->convert->common . $this->lang->colon;
         $this->display();
     }
 
-    /* 转换参数设置。*/
+    /**
+     * Set configs of converter.
+     *
+     * This is the extrance of every system. It will call the set function of corresponding module.
+     * 
+     * @access public
+     * @return void
+     */
     public function setConfig()
     {
         if(!$this->post->source) 
@@ -43,7 +60,13 @@ class convert extends control
         $this->display();
     }
 
-    /* BugFree的设置界面。*/
+    /**
+     * The setting page of bugfree.
+     * 
+     * @param  string    $version 
+     * @access public
+     * @return void
+     */
     public function setBugFree($version)
     {
         $this->view->source      = 'BugFree';
@@ -54,7 +77,12 @@ class convert extends control
         $this->display();
     }
 
-    /* 检查配置。*/
+    /**
+     * Check config. Same as setConfig.
+     * 
+     * @access public
+     * @return void
+     */
     public function checkConfig()
     {
         $checkFunc = 'check' . $this->post->source;
@@ -64,22 +92,28 @@ class convert extends control
         $this->display();
     }
 
-    /* 检查BugFree的设置。*/
+    /**
+     * Check settings of bugfree.
+     * 
+     * @param  int    $version 
+     * @access public
+     * @return void
+     */
     public function checkBugFree($version)
     {
         helper::import('./converter/bugfree.php');
         $converter = new bugfreeConvertModel();
 
-        /* 分别检查数据库、表和安装路径。*/
+        /* Check it. */
         $checkInfo['db'] = $converter->connectDB();
         //if(is_object($checkInfo['db'])) $checkInfo['table'] = $converter->checkTables();
         $checkInfo['path'] = $converter->checkPath();
 
-        /* 计算检查结果。*/
+        /* Compute the checking result. */
         $result = 'pass';
         if(!is_object($checkInfo['db']) or !$checkInfo['path']) $result = 'fail';
 
-        /* 赋值。*/
+        /* Assign. */
         $this->view->version   = $version;
         $this->view->source    = 'bugfree';
         $this->view->result    = $result;
@@ -87,7 +121,12 @@ class convert extends control
         $this->display();
     }
 
-    /* 执行转换。*/
+    /**
+     * Execute the converting.
+     * 
+     * @access public
+     * @return void
+     */
     public function execute()
     {
         $convertFunc = 'convert' . $this->post->source;
@@ -98,7 +137,13 @@ class convert extends control
         $this->display();
     }
 
-    /* 转换BugFree。*/
+    /**
+     * Convert bugfree.
+     * 
+     * @param  int    $version 
+     * @access public
+     * @return void
+     */
     public function convertBugFree($version)
     {
         helper::import('./converter/bugfree.php');
diff --git a/module/convert/converter/bugfree.php b/module/convert/converter/bugfree.php
index 104efc643c..e3d10bd7ca 100644
--- a/module/convert/converter/bugfree.php
+++ b/module/convert/converter/bugfree.php
@@ -15,38 +15,69 @@ class bugfreeConvertModel extends convertModel
     public $filePath    = '';
     static public $info = array();
 
-    /* 构造函数，连接到数据库。*/
+    /**
+     * Connect to db auto.
+     * 
+     * @access public
+     * @return void
+     */
     public function __construct()
     {
         parent::__construct();
         parent::connectDB();
     }
 
-    /* 检查Tables。*/
+    /**
+     * Check table.
+     * 
+     * @access public
+     * @return bool
+     */
     public function checkTables()
     {
         return true;
     }
 
-    /* 检查安装路径。*/
+    /**
+     * Check the install path.
+     * 
+     * @access public
+     * @return bool
+     */
     public function checkPath()
     {
         $this->setPath();
         return file_exists($this->filePath);
     }
 
-    /* 设置附件路径。*/
+    /**
+     * Set the path of attachments.
+     * 
+     * @access public
+     * @return bool
+     */
     public function setPath()
     {
         $this->filePath = realpath($this->post->installPath) . $this->app->getPathFix() . 'BugFile' . $this->app->getPathFix();
     }
 
-    /* 执行转换。*/
+    /**
+     * Excute the convert.
+     * 
+     * @param  int    $version 
+     * @access public
+     * @return void
+     */
     public function execute($version)
     {
     }
 
-    /* 清空导入之后的数据。*/
+    /**
+     * Clear rows added in converting.
+     * 
+     * @access public
+     * @return void
+     */
     public function clear()
     {
         foreach($this->session->state as $table => $maxID)
diff --git a/module/convert/converter/bugfree1.php b/module/convert/converter/bugfree1.php
index 4e3149b9a8..476033293c 100644
--- a/module/convert/converter/bugfree1.php
+++ b/module/convert/converter/bugfree1.php
@@ -11,7 +11,12 @@
  */
 class bugfree1ConvertModel extends bugfreeConvertModel
 {
-    /* 执行转换。*/
+    /**
+     * Execute the convert.
+     * 
+     * @access public
+     * @return array
+     */
     public function execute()
     {
         $this->clear();
@@ -27,7 +32,12 @@ class bugfree1ConvertModel extends bugfreeConvertModel
         return $result;
     }
 
-    /* 转换用户分组。*/
+    /**
+     * Convert groups.
+     * 
+     * @access public
+     * @return void
+     */
     public function convertGroup()
     {
         $groups = $this->dao->dbh($this->sourceDBH)
@@ -36,16 +46,16 @@ class bugfree1ConvertModel extends bugfreeConvertModel
             ->fetchAll('id', $autoCompany = false);
         foreach($groups as $groupID => $group)
         {
-            /* 将分组用户拆分成数组。*/
+            /* Explode into array. */
             $groupUsers = explode(',', $group->users);
             unset($group->id);
             unset($group->users);
 
-            /* 插入到group表中。*/
+            /* Insert the group. */
             $this->dao->dbh($this->dbh)->insert(TABLE_GROUP)->data($group)->exec();
             $zentaoGroupID = $this->dao->lastInsertId();
 
-            /* 设置账户和group的对应关系。*/
+            /* Insert account. */
             foreach($groupUsers as $account)
             {
                 if(empty($account)) continue;
@@ -54,10 +64,15 @@ class bugfree1ConvertModel extends bugfreeConvertModel
         }
     }
 
-    /* 转换用户。*/
+    /**
+     * Convert user.
+     * 
+     * @access public
+     * @return int      converted user count
+     */
     public function convertUser()
     {
-        /* 查询当前系统中存在的用户。*/
+        /* Get users exist in the system. */
         $activeUsers = $this->dao
             ->dbh($this->sourceDBH)
             ->select("username AS account, userpassword AS password, realname, email")
@@ -65,10 +80,10 @@ class bugfree1ConvertModel extends bugfreeConvertModel
             ->orderBy('userID ASC')
             ->fetchAll('account', $autoCompany = false);
 
-        /* 查找曾经出现过的用户。*/
+        /* Get users in histories. */
         $allUsers = $this->dao->select("distinct(username) AS account")->from('BugHistory')->fetchPairs('', '', $autoCompany = false);
 
-        /* 合并二者。*/
+        /* Merge them. */
         foreach($allUsers as $key => $account)
         {
             if(isset($activeUsers[$account])) 
@@ -82,7 +97,7 @@ class bugfree1ConvertModel extends bugfreeConvertModel
         }
         foreach($activeUsers as $account => $user) if(!isset($allUsers[$account])) $allUsers[$account] = $user;
 
-        /* 导入到zentao数据库中。*/
+        /* Insert into zentao. */
         $convertCount = 0;
         foreach($allUsers as $account => $user)
         {
@@ -99,7 +114,12 @@ class bugfree1ConvertModel extends bugfreeConvertModel
         return $convertCount;
     }
 
-    /* 转换项目为产品。*/
+    /**
+     * Convert project in bugfree to product in zentao.
+     * 
+     * @access public
+     * @return int      converted project count
+     */
     public function convertProject()
     {
         $projects = $this->dao->dbh($this->sourceDBH)->select("projectID AS id, projectName AS name")->from('BugProject')->fetchAll('id', $autoCompany = false);
@@ -112,7 +132,12 @@ class bugfree1ConvertModel extends bugfreeConvertModel
         return count($projects);
     }
 
-    /* 转换原来的模块为Bug视图模块。*/
+    /**
+     * Convert modules.
+     * 
+     * @access public
+     * @return int      converted modules count
+     */
     public function convertModule()
     {
         $this->map['module'][0] = 0;
@@ -136,7 +161,7 @@ class bugfree1ConvertModel extends bugfreeConvertModel
             $this->map['module'][$moduleID] = $this->dao->lastInsertID();
         }
 
-        /* 更新parent。*/
+        /* Update parents. */
         foreach($modules as $oldModuleID => $module)
         {
             $newModuleID = $this->map['module'][$oldModuleID];
@@ -146,7 +171,12 @@ class bugfree1ConvertModel extends bugfreeConvertModel
         return count($modules);
     }
 
-    /* 转换Bug。*/
+    /**
+     * Convert bugs.
+     * 
+     * @access public
+     * @return int      converted bugs count.
+     */
     public function convertBug()
     {
         $bugs = $this->dao
@@ -173,7 +203,7 @@ class bugfree1ConvertModel extends bugfreeConvertModel
             ->fetchAll('id', $autoCompany = false);
         foreach($bugs as $bugID => $bug)
         {
-            /* 修正Bug数据。*/
+            /* Adjust some fields of bug. */
             $bugID = (int)$bugID;
             unset($bug->id);
             if($bug->assignedTo == 'Closed') $bug->assignedTo = 'closed';
@@ -187,7 +217,7 @@ class bugfree1ConvertModel extends bugfreeConvertModel
             $this->map['bug'][$bugID] = $this->dao->lastInsertID();
         }
 
-        /* 更新duplicateBug。 */
+        /* Update duplicated bugs. */
         foreach($this->map['bug'] as $oldBugID => $newBugID)
         {
             $this->dao->dbh($this->dbh)->update(TABLE_BUG)->set('duplicateBug')->eq($newBugID)->where('duplicateBug')->eq($oldBugID)->exec();
@@ -195,7 +225,12 @@ class bugfree1ConvertModel extends bugfreeConvertModel
         return count($bugs);
     }
 
-    /* 转换历史记录。*/
+    /**
+     * Convert actions.
+     * 
+     * @access public
+     * @return int      converted actions count.
+     */
     public function convertAction()
     {
         $actions = $this->dao
@@ -213,11 +248,11 @@ class bugfree1ConvertModel extends bugfreeConvertModel
         $convertCount = 0;
         foreach($actions as $bugID => $bugActions)
         {
-            /* 获得转换之后的bugID。*/
+            /* Get the related bugID. */
             $bugID       = (int)$bugID;
             $zentaoBugID = $this->map['bug'][$bugID];
 
-            /* 处理action。*/
+            /* Process actions. */
             foreach($bugActions as $key => $action)
             {
                 $action->objectID = $zentaoBugID;
@@ -233,7 +268,12 @@ class bugfree1ConvertModel extends bugfreeConvertModel
         return $convertCount;
     }
 
-    /* 转换附件。*/
+    /**
+     * Convert files.
+     * 
+     * @access public
+     * @return int      converted files count.
+     */
     public function convertFile()
     {
         $this->setPath();
@@ -258,7 +298,7 @@ class bugfree1ConvertModel extends bugfreeConvertModel
             if(strpos($file->size, 'MB')) $file->size = (int)(str_replace('MB', '', $file->size) * 1024 * 1024); 
             $this->dao->dbh($this->dbh)->insert(TABLE_FILE)->data($file)->exec();
 
-            /* 拷贝文件。*/
+            /* Copy files. */
             $soureFile = $this->filePath . $file->pathname;
             if(!file_exists($soureFile))
             {
diff --git a/module/convert/converter/bugfree2.php b/module/convert/converter/bugfree2.php
index 8f9485c3ee..d7856196ca 100644
--- a/module/convert/converter/bugfree2.php
+++ b/module/convert/converter/bugfree2.php
@@ -11,7 +11,12 @@
  */
 class bugfree2ConvertModel extends bugfreeConvertModel
 {
-    /* 执行转换。*/
+    /**
+     * Execute the converter.
+     * 
+     * @access public
+     * @return array
+     */
     public function execute()
     {
         $this->clear();
@@ -30,7 +35,12 @@ class bugfree2ConvertModel extends bugfreeConvertModel
         return $result;
     }
 
-    /* 设置表名。*/
+    /**
+     * Set table names. 
+     * 
+     * @access public
+     * @return void
+     */
     public function setTable()
     {
         $dbPrefix = $this->post->dbPrefix;
@@ -46,10 +56,15 @@ class bugfree2ConvertModel extends bugfreeConvertModel
         define('BUGFREE_TABLE_GROUP',      $dbPrefix . 'TestGroup');
     }
 
-    /* 转换用户。*/
+    /**
+     * Convert user.
+     * 
+     * @access public
+     * @return int      converted user count
+     */
     public function convertUser()
     {
-        /* 获得所有的用户列表。*/
+        /* Get all user list. */
         $users = $this->dao
             ->dbh($this->sourceDBH)
             ->select("username AS account, userpassword AS password, realname, email, isDroped AS deleted")
@@ -57,7 +72,7 @@ class bugfree2ConvertModel extends bugfreeConvertModel
             ->orderBy('userID ASC')
             ->fetchAll('account', $autoCompany = false);
 
-        /* 导入到zentao数据库中。*/
+        /* Insert into zentao. */
         $convertCount = 0;
         foreach($users as $account => $user)
         {
@@ -74,7 +89,12 @@ class bugfree2ConvertModel extends bugfreeConvertModel
         return $convertCount;
     }
 
-    /* 转换用户分组。*/
+    /**
+     * Convert groups.
+     * 
+     * @access public
+     * @return void     converted group count.
+     */
     public function convertGroup()
     {
         $groups = $this->dao->dbh($this->sourceDBH)
@@ -83,17 +103,17 @@ class bugfree2ConvertModel extends bugfreeConvertModel
             ->fetchAll('id', $autoCompany = false);
         foreach($groups as $groupID => $group)
         {
-            /* 处理group数据。*/
+            /* Fix the group data. */
             if($group->name == '[All Users]') continue;
             $groupUsers = explode(',', $group->users);
             unset($group->id);
             unset($group->users);
 
-            /* 插入到group表。*/
+            /* Insert into zentao's group table. */
             $this->dao->dbh($this->dbh)->insert(TABLE_GROUP)->data($group)->exec();
             $zentaoGroupID = $this->dao->lastInsertId();
 
-            /* 插入到userGroup表。*/
+            /* Insert into zentao's usergroup table. */
             foreach($groupUsers as $account)
             {
                 if(empty($account)) continue;
@@ -105,7 +125,12 @@ class bugfree2ConvertModel extends bugfreeConvertModel
         }
     }
 
-    /* 转换项目为产品。*/
+    /**
+     * Convert projects.
+     * 
+     * @access public
+     * @return int      converted projects count.
+     */
     public function convertProject()
     {
         $projects = $this->dao->dbh($this->sourceDBH)
@@ -121,7 +146,12 @@ class bugfree2ConvertModel extends bugfreeConvertModel
         return count($projects);
     }
 
-    /* 转换原来的模块为Bug视图模块。*/
+    /**
+     * Convert modules.
+     * 
+     * @access public
+     * @return int      converted modules count.
+     */
     public function convertModule()
     {
         $this->map['module'][0] = 0;
@@ -147,7 +177,7 @@ class bugfree2ConvertModel extends bugfreeConvertModel
             $this->map['module'][$moduleID] = $this->dao->lastInsertID();
         }
 
-        /* 更新parent。*/
+        /* Update parent. */
         foreach($modules as $oldModuleID => $module)
         {
             $newModuleID = $this->map['module'][$oldModuleID];
@@ -157,7 +187,12 @@ class bugfree2ConvertModel extends bugfreeConvertModel
         return count($modules);
     }
 
-    /* 转换Bug。*/
+    /**
+     * Convert bugs.
+     * 
+     * @access public
+     * @return int      converted bugs count.
+     */
     public function convertBug()
     {
         $bugs = $this->dao
@@ -195,7 +230,7 @@ class bugfree2ConvertModel extends bugfreeConvertModel
             ->fetchAll('id', $autoCompany = false);
         foreach($bugs as $bugID => $bug)
         {
-            /* 修正Bug数据。*/
+            /* Fix some fileds of bug. */
             $bugID = (int)$bugID;
             unset($bug->id);
 
@@ -221,7 +256,7 @@ class bugfree2ConvertModel extends bugfreeConvertModel
             $this->map['bug'][$bugID] = $this->dao->lastInsertID();
         }
 
-        /* 更新duplicateBug。 */
+        /* Update duplicated bugs. */
         foreach($this->map['bug'] as $oldBugID => $newBugID)
         {
             $this->dao->dbh($this->dbh)->update(TABLE_BUG)->set('duplicateBug')->eq($newBugID)->where('duplicateBug')->eq($oldBugID)->exec();
@@ -229,7 +264,12 @@ class bugfree2ConvertModel extends bugfreeConvertModel
         return count($bugs);
     }
 
-    /* 转换case。*/
+    /**
+     * Convert cases.
+     * 
+     * @access public
+     * @return int      converted cases count.
+     */
     public function convertCase()
     {
         $cases = $this->dao
@@ -259,7 +299,7 @@ class bugfree2ConvertModel extends bugfreeConvertModel
             ->fetchAll('id', $autoCompany = false);
         foreach($cases as $caseID => $case)
         {
-            /* 修正case的数据。*/
+            /* Fix fields of case. */
             $caseID = (int)$caseID;
             $step   = $case->step;
             $bugs   = explode(',', $case->bugID);
@@ -277,22 +317,22 @@ class bugfree2ConvertModel extends bugfreeConvertModel
             if($case->type == 'functional')    $case->type   = 'feature';
             if($case->status == 'active')      $case->status = 'normal';
             
-            /* 将产品和模块替换成禅道系统中的id。*/
+            /* Change product and module by zentao's product and module. */
             $case->product = $this->map['product'][$case->product];
             $case->module  = $this->map['module'][$case->module];
 
-            /* 插入到case表中。*/
+            /* Insert into case table. */
             $this->dao->dbh($this->dbh)->insert(TABLE_CASE)->data($case)->exec();
             $zentaoCaseID = $this->dao->lastInsertID();
             $this->map['case'][$caseID] = $zentaoCaseID;
 
-            /* 用例步骤表。*/
+            /* Insert into case step table. */
             $caseStep->case    = $zentaoCaseID;
             $caseStep->version = 1;
             $caseStep->desc    = $step;
             $this->dao->dbh($this->dbh)->insert(TABLE_CASESTEP)->data($caseStep)->exec();
 
-            /* 更新相关bug。*/
+            /* Update related bugs. */
             foreach($bugs as $bugID)
             {
                 if(!isset($this->map['bug'][$bugID])) continue;
@@ -303,7 +343,12 @@ class bugfree2ConvertModel extends bugfreeConvertModel
         return count($cases);
     }
 
-    /* 转换测试执行结果。*/
+    /**
+     * Convert results.
+     * 
+     * @access public
+     * @return int      converted results count.
+     */
     public function convertResult()
     {
         $results = $this->dao->dbh($this->sourceDBH)
@@ -322,23 +367,28 @@ class bugfree2ConvertModel extends bugfreeConvertModel
         {
             unset($result->id);
 
-            /* 记录对应的bug信息。*/
+            /* The bug id of zentao. */
             $bugID = (int)$result->bugID;
             $zentaoBugID = $this->map['bug'][$bugID];
             unset($result->bugID);
 
-            /* 插入到testResult表中。*/
+            /* Insert into test result table. */
             $this->dao->dbh($this->dbh)->insert(TABLE_TESTRESULT)->data($result)->exec();
             $zentaoResultID = $this->dao->lastInsertId();
             $this->map['result'][$resultID] = $zentaoResultID;
 
-            /* 更新bug表中的result字段。*/
+            /* Update result table. */
             $this->dao->dbh($this->dbh)->update(TABLE_BUG)->set('result')->eq($zentaoResultID)->where('id')->eq($zentaoBugID)->limit(1)->exec();
         }
         return count($results);
     }
 
-    /* 转换历史记录。*/
+    /**
+     * Convert actions.
+     * 
+     * @access public
+     * @return int      converted actions count.
+     */
     public function convertAction()
     {
         $actions = $this->dao
@@ -370,7 +420,12 @@ class bugfree2ConvertModel extends bugfreeConvertModel
         return count($actions);
     }
 
-    /* 转换历史修改记录。*/
+    /**
+     * Convert histories.
+     * 
+     * @access public
+     * @return int      the converted histories count.
+     */
     public function convertHistory()
     {
         $histories = $this->dao->dbh($this->sourceDBH)
@@ -385,7 +440,12 @@ class bugfree2ConvertModel extends bugfreeConvertModel
         }
     }
 
-    /* 转换附件。*/
+    /**
+     * Convert attachments.
+     * 
+     * @access public
+     * @return int      the converted files count.
+     */
     public function convertFile()
     {
         $this->setPath();
@@ -402,7 +462,7 @@ class bugfree2ConvertModel extends bugfreeConvertModel
             ->fetchAll('', $autoCompany = false);
         foreach($files as $file)
         {
-            /* 查找对应的action信息，以获得文件的相关字段。*/
+            /* Get the actionID in zentao, to get file info. */
             $zentaoActionID = $this->map['action'][$file->actionID];
             $zentaoAction   = $this->dao->dbh($this->dbh)->findById($zentaoActionID)->from(TABLE_ACTION)->fetch();
             $file->objectType = $zentaoAction->objectType;
@@ -411,14 +471,14 @@ class bugfree2ConvertModel extends bugfreeConvertModel
             $file->addedDate  = $zentaoAction->date;
             unset($file->actionID);
 
-            /* 处理文件大小。*/
+            /* Compute the file size. */
             if(strpos($file->size, 'KB')) $file->size = (int)(str_replace('KB', '', $file->size) * 1024); 
             if(strpos($file->size, 'MB')) $file->size = (int)(str_replace('MB', '', $file->size) * 1024 * 1024); 
 
-            /* 插入到数据库。*/
+            /* Insert into database. */
             $this->dao->dbh($this->dbh)->insert(TABLE_FILE)->data($file)->exec();
 
-            /* 拷贝文件。*/
+            /* Copy file. */
             $soureFile = $this->filePath . $file->pathname;
             if(!file_exists($soureFile))
             {
@@ -436,7 +496,12 @@ class bugfree2ConvertModel extends bugfreeConvertModel
         return count($files);
     }
 
-    /* 清空导入之后的数据。*/
+    /**
+     * Clear the converted records.
+     * 
+     * @access public
+     * @return void
+     */
     public function clear()
     {
         foreach($this->session->state as $table => $maxID)
diff --git a/module/convert/model.php b/module/convert/model.php
index 7465317265..a0693446a2 100644
--- a/module/convert/model.php
+++ b/module/convert/model.php
@@ -13,7 +13,12 @@
 <?php
 class convertModel extends model
 {
-    /* 连接到数据库。*/
+    /**
+     * Connect to db.
+     * 
+     * @access public
+     * @return void
+     */
     public function connectDB()
     {
         $dsn = "mysql:host={$this->post->dbHost}; port={$this->post->dbPort};dbname={$this->post->dbName}";
@@ -32,21 +37,31 @@ class convertModel extends model
         }
     }
  
-    /* 判断数据库是否存在。*/
+    /**
+     * Check database exits or not.
+     * 
+     * @access public
+     * @return object
+     */
     public function dbExists()
     {
         $sql = "SHOW DATABASES like '{$this->post->db->name}'";
         return $this->dbh->query($sql)->fetch();
     }
 
-    /* 记录当前数据库中的每个表最大id。*/
+    /**
+     * Save the max id of every table. Thus when we convert again, when can delete id larger then the saved max id.
+     * 
+     * @access public
+     * @return void
+     */
     public function saveState()
     {
-        /* 获得用户级别的常量定义列表。*/
+        /* Get user defined tables. */
         $constants     = get_defined_constants(true);
         $userConstants = $constants['user'];
 
-        /* 去掉不需要保存状态的表。*/
+        /* These tables needn't save. */
         unset($userConstants['TABLE_BURN']);
         unset($userConstants['TABLE_GROUPPRIV']);
         unset($userConstants['TABLE_PROJECTPRODUCT']);
@@ -55,7 +70,7 @@ class convertModel extends model
         unset($userConstants['TABLE_TEAM']);
         unset($userConstants['TABLE_USERGROUP']);
 
-        /* 查找每个表的id字段的最大值。*/
+        /* Get max id of every table. */
         foreach($userConstants as $key => $value)
         {
             if(strpos($key, 'TABLE') === false) continue;