If a place or business, etc. reopens or is reopened, it begins to operate, or it becomes open for people to use, after being closed for a period of time.

The museum has reopened after nearly two years of reconstruction. 经过近两年的重建，博物馆重新开放。

He hung a sign on the door of the shop which said it would reopen at 11.00. 他在商店门上挂了个牌子，写着11点重新开门营业。

If a formal process or activity reopens or is reopened, it begins again or starts to be dealt with again after a period of time.

to reopen an enquiry/investigation 重新调查

to reopen a debate/discussion 重新开始辩论／讨论

to reopen a legal case/file 重新审理案件／处理档案