At that point her husband happened to knock on the door.

就在这时她的丈夫正好回来敲开房门。

youdao

The guy warned me that you have to knock on the door first to scatter them away.

店员警告我说开门前最好先敲敲门，以便把它们吓跑。

youdao

Life without love is not perfect, should continue to knock on the door of love.

没有爱情的人生是不完美的，应该继续去叩响爱情的大门。

youdao

Fortunately for the British, his Anglophilia survived the rebuff he received as a young man when his admiration for William Pitt the Elder had led him to knock on the door of Pitt's house in London, by then the home of the Royal Institute of International Affairs.

ECONOMIST: Caspar Weinberger

Take some steps to prevent a repeat performance: Install a lock on your bedroom door, encourage kids to knock, play soft music or the TV for white noise at night, and schedule "private parent time" when your child knows not to disturb you.

CNN: When your child walks in during sex

They knock on the door and ask the partyers to make less noise, and then leave.

FORBES: Crime and Non-Punishment: When Cops And DA's Are The Problem Rather Than The Solution