孩子们安静地进入图书馆。

Háizimen ānjìng de jìnrù túshūguǎn.

The children quietly entered the library.

请不要进入这个房间。

Qǐng búyào jìnrù zhège fángjiān.

Please do not enter this room.

天气越来越冷，我们进入了冬天。

Tiānqì yuèláiyuè lěng, wǒmen jìnrù le dōngtiān.

The weather is getting colder and colder; we have entered winter.