knock是一个英文单词，名词、动词，作名词时意思是“敲；敲打；爆震声”，作及物动词时意思是“敲；打；敲击；批评”，作不及物动词时意思是“敲；打；敲击”。

相关介绍：

What time do you knock off work?

你什么时候下班？

I knocked but there was no one around.

我敲了门，但是没有人应门。

The two rooms had been knocked into one.

那两间屋子打通了，成为一间屋。

He knocked his opponent down three times in the first round.

他第一局就将对手击倒三次。

They had to knock the door down to get in.

他们不得不破门而入。

The news knocked 13% off the company's shares.

这消息使公司股价下跌13%。

I've got all the information together but it still needs knocking into shape.

我把材料全都收集齐了，但还需要整理。

He was knocked out cold in the second round.

他在第二轮中被击倒失去了知觉。

He'd knocked over a glass of water.

他打翻了一杯水。

I knocked on the door but there was no response.

我敲了门，可是没有回应。

Be careful you don't knock your head on this low beam.

小心，别把头撞在这矮梁上。