他不熟悉图书馆的制度，所以我们应该告诉他。的翻译：He is not familiar with the library system, so we should tell him. 什么意思？中文翻译英文，英文翻译中文，怎么说？

青云英语翻译

He was not familiar with the library system, so we should tell him.

He is not familiar with the library system, so we should tell him.

His not familiar library system, therefore we should tell him.

He was not familiar with library system, so we should have told him.

He is not familiar with the library system, so we should tell him.