他每天读书到深夜，有时候不知不觉伏在书案上就睡着了。

Everyday he studied far into the night. Sometimes he fell asleep on the writing desk.

youdao

他每天读书到深夜，有时候不知不觉伏在书案上就睡着了。

Everyday he studied far into the night. Sometimes he fell asleep on the writing desk.

youdao