如果你丢失的话，我的孩子们经常丢书，你必须买一本新的还给图书馆。

And if you don't, you'll pay the penalty and if you lose it, which my children do sometimes, you have to replace it and buy them a new book or video.

youdao

她的书就是你丢的那本。

She has the same book that you lost.

youdao

她的书就是你丢的那本。

She has the same book that you lost.

youdao