zh_CN update

program/localization/zh_CN/labels.inc

@@ -123,6 +123,7 @@ $labels['none'] = '无';
 $labels['unread'] = '未读';
 $labels['flagged'] = '已标记';
 $labels['unanswered'] = '未回复';
+$labels['filter'] = '过滤';
 $labels['compact'] = '压缩';
 $labels['empty'] = '清空';
 $labels['purge'] = '清除';
@@ -242,7 +243,7 @@ $labels['2231folding'] = '完整的 RFC 2231（Thunderbird）';
 $labels['miscfolding'] = 'RFC 2047/2232（MS Outlook）';
 $labels['2047folding'] = '完整的 RFC 2047（其它）';
 $labels['advancedoptions'] = '高级选项';
-$labels['focusonnewmessage'] = 'Focus browser window on new message';
+$labels['focusonnewmessage'] = '新邮件到达时将窗口提升为焦点窗口';
 $labels['checkallfolders'] = '检查所有邮件夹里的新邮件';
 $labels['folder'] = '邮件夹';
 $labels['folders'] = '邮件夹';