chore: Translate django.po in zh_CN

72% of minimum 50% translated source file: 'django.po'
on 'zh_CN'.

Sync of partially translated files: 
untranslated content is included with an empty translation 
or source language content depending on file format

translations/xblock-drag-and-drop-v2/drag_and_drop_v2/conf/locale/zh_CN/LC_MESSAGES/django.po

@@ -705,19 +705,19 @@ msgstr "拖放型题目"
 
 #: public/js/drag_and_drop.js:662
 msgid "Problem"
-msgstr ""
+msgstr "问题"
 
 #: public/js/drag_and_drop.js:687
 msgid "Item Bank"
-msgstr ""
+msgstr "答题项库"
 
 #: public/js/drag_and_drop.js:732
 msgid "Drop Targets"
-msgstr ""
+msgstr "放下目标"
 
 #: public/js/drag_and_drop.js:898
 msgid "An error occurred. Unable to load drag and drop problem."
-msgstr ""
+msgstr "发生了错误。无法加载拖放问题。"
 
 #: public/js/drag_and_drop.js:1359
 msgid "You cannot add any more items to this zone."
@@ -726,11 +726,11 @@ msgstr ""
 #: public/js/drag_and_drop_edit.js:123 public/js/drag_and_drop_edit.js:520
 #: public/js/drag_and_drop_edit.js:751
 msgid "There was an error with your form."
-msgstr ""
+msgstr "您的表格有一个错误。"
 
 #: public/js/drag_and_drop_edit.js:124
 msgid "Please check over your submission."
-msgstr ""
+msgstr "请核对您的提交信息。"
 
 #: public/js/drag_and_drop_edit.js:370
 msgid "Zone {num}"
@@ -743,4 +743,4 @@ msgstr ""
 
 #: public/js/drag_and_drop_edit.js:744
 msgid "Saving"
-msgstr ""
+msgstr "正在保存"