孩子们经常被告知不要在图书馆大声说话。他们必须保持安静。

The children are often asked not to speak loudly in the library. They must keep quiet.

youdao

安妮一家不想让任何人找到他们，所以白天必须格外保持安静，因为楼下就是商店。

They didn't want anyone to find them, so they had to keep extra quiet during the day time because of the shop downstairs.

youdao