It is not appropriate to walk into somebody's bedroom when the door is closed. You must always knock first.

当别人卧室门关上时不适合直接开门进去，你应该先敲敲门。

youdao

It is not appropriate to walk into somebody's bedroom when the door is closed. You must always knock first.

当别人卧室门关上时不适合直接开门进去，你应该先敲敲门。

youdao