对不起
自由注册当前关闭，只允许校内用户通过学号（工号）注册或者邀请注册。如果你是校外用户，请找到能够邀请你 进入本站的朋友


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I am sorry
Register free closed, allowing only the user through the campus student number (work number) registered or invite registered. If you are a school user, please find ways to invite your friends to enter the site