diff --git a/app/models/mailer.rb b/app/models/mailer.rb
index 7aa793d82..226ce02bb 100644
--- a/app/models/mailer.rb
+++ b/app/models/mailer.rb
@@ -120,8 +120,8 @@ class Mailer < ActionMailer::Base
       count = courses.count
       count = count - 1
       for i in 0..count do
-        bids =  courses[i].homework_commons.where("homework_commons.created_at between '#{date_from}' and '#{date_to}'").order(" '#{courses[i].id}', homework_commons.created_at desc")
-        attachments = courses[i].attachments.where("attachments.created_on between '#{date_from}' and '#{date_to}'").order(" '#{courses[i].id}',attachments.created_on DESC' ")
+        bids =  courses[i].homework_commons.where("homework_commons.created_at between '#{date_from}' and '#{date_to}'").order("homework_commons.created_at desc")
+        attachments = courses[i].attachments.where("attachments.created_on between '#{date_from}' and '#{date_to}'").order("attachments.created_on DESC' ")
         @bids += bids if bids.count > 0
         @attachments += attachments if attachments.count > 0
       end
diff --git a/app/views/mailer/send_for_user_activities.html.erb b/app/views/mailer/send_for_user_activities.html.erb
index 22eb23bf7..264a420cb 100644
--- a/app/views/mailer/send_for_user_activities.html.erb
+++ b/app/views/mailer/send_for_user_activities.html.erb
@@ -5,7 +5,7 @@
 <% if @attachments.first || @course_news.first || @course_news_comments.first || @bids.first ||
         @course_journal_messages.first|| @course_messages.first || @attachments.first %>
     <div class="wmail_main" style="padding:20px 10px 0px;">
-      <h3 class="wmail_h2" style="color:#15bccf; "><%= l(:label_course_overview)%></h3>
+      <h3 class="wmail_h2" style="color:#474646; "><%= l(:label_course_overview)%></h3>
       <!-- 课程通知 -->
       <% unless @course_news.first.nil? || @course_news_comments.first.nil? %>
           <ul class="wmail_ul" style=" list-style-type:none;clear: both;margin-left:10px; border-bottom:1px dashed #cfcfcf; padding-bottom:15px; width:1020px; margin-bottom:15px;">
@@ -189,7 +189,7 @@
 <% if @issues.first || @project_messages.first || @issues_journals.first || @wiki_contents.first || @project_news.first || @project_news_comments.first || @project_journal_messages.first ||
         @project_news_comments.first  %>
     <div class="wmail_main" style="padding:20px 10px 0px;">
-      <h3 class="wmail_h2" style="color:#15BCCF; "><%= l(:label_project_overview_new)%></h3>
+      <h3 class="wmail_h2" style="color:#474646; "><%= l(:label_project_overview_new)%></h3>
       <% unless @issues.first.nil? || @issues_journals.first.nil? %>
           <ul class="wmail_ul" style="margin-left:10px; border-bottom:1px dashed #cfcfcf; padding-bottom:15px; width:1020px; margin-bottom:15px;">
             <span class="wmail_h4" style="color:#666; font-size:14px; margin-bottom:5px;" >
@@ -508,7 +508,7 @@
     </div><!--贴吧动态 end-->
 <% end %>
 <div class="wmail_foot" style="margin-top:20px;color:#2775d2; margin-left:10px;">
-<span style="color:#666;"><%= l(:label_mail_policy) %>：</span>
+<span style="color:#474646;"><%= l(:label_mail_policy) %>：</span>
   <% [:label_user_mail_option_all, :label_user_mail_option_day, :label_user_mail_option_none].each do |mail_option| %>
       <% if Hash[*User::MAIL_NOTIFICATION_OPTIONS.flatten][@user.mail_notification] == mail_option %>
           <label style="margin-top:20px;color:gray; margin-left:10px;"><%= l(mail_option) %></label>
diff --git a/config/locales/commons/zh.yml b/config/locales/commons/zh.yml
index 5dee0b505..457d56dad 100644
--- a/config/locales/commons/zh.yml
+++ b/config/locales/commons/zh.yml
@@ -337,7 +337,7 @@ zh:
   #
   #  贴吧动态栏
   # 
-  lable_bar_active: 问题和反馈动态
+  lable_bar_active: 贴吧动态
   label_my_question: 我要提问
   label_my_feedback: 我要反馈
 
diff --git a/config/locales/zh.yml b/config/locales/zh.yml
index 4306b51c8..1e3be5895 100644
--- a/config/locales/zh.yml
+++ b/config/locales/zh.yml
@@ -737,7 +737,7 @@ zh:
   label_date_to: 到
   label_language_based: 根据用户的语言
 
-  label_mail_policy: 邮件策略
+  label_mail_policy: 您可以修改邮件通知策略
   label_send_test_email: 发送测试邮件
   label_feeds_access_key: RSS存取键
   label_missing_feeds_access_key: 缺少RSS存取键