All at once there was someone knocking on the door.

突然有人敲门。

《柯林斯英汉双解大词典》

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I was knocking at the front door but there was no answer.

我敲了敲前门，但无人应答。

《柯林斯英汉双解大词典》

said that in the night she had been awakened, some men were knocking at the door, and they had been sent by Charles Taylor, and they had given her a huge diamond."

VOA: standard.2010.08.09

It's all seen from her point of view and at a distance And then somebody is knocking at the door and breaking in, and that's Kane And then there's a close-up of Kane leaning over the bed ? Right?

都是从苏珊的角度来拍的,镜头比较远,先是有人敲门,那人闯了进来，是凯恩,然后有个对凯恩,俯在床头的特写,对么？

麻省理工公开课 - 电影哲学课程节选

Leaving Ms Roberts to some door knocking, I headed off to meet independent Bryan Owen outside county hall, who comes armed with a report full of praise for the way the council has improved.

BBC: Anglesey council election: a week to go to polling day

His trip to a poor estate in Glasgow in 2002 for a by election turned out to be more than the usual hand shaking, envelope stuffing, door knocking political trip for the then Conservative leader.

BBC: Welfare reform: A chance to curb fraudulent payments?

I've done a lot of door-knocking both in Eastleigh and in my patch this last week.

BBC: Lib Dem MP Tim Farron