knock about

1. 漂泊; 漫游

They have knocked about all over the world.

他们曾周游世界。

2. 殴打; 虐待

The woman was cruelly knocked about by her husband.

那女人遭到她丈夫的毒打。

knock down

1. 击倒; 击落

Bill knocked him down with one blow.

比尔一拳把他打倒在地。

2. 拆毁

The building is being knocked down.

这座建筑物正被拆毁。

3. 降低

I knocked his price down to $20.

我把他的售价降到二十元。

knock off

1. 撞倒; 打掉

The little girl knocked the glass off by accident.

小女孩不小心碰落了玻璃杯。

2. 减去

They knocked off five dollars from the price.

他们把价格降低了五美元。

3. 停止; 歇工

Let's knock off now.

咱们现在歇一会儿吧。

knock out

1. 击倒

Jack knocked his opponent out in the second round of the contest.

杰克在比赛的第二回合就把对方击倒了。

2. 使昏迷

The drug knocked him out.

麻醉毒品使他昏迷了。

3. 淘汰

Our team was knocked out in the second run.

我们的队在第二轮比赛中被淘汰。

knock over

1. 打翻; 撞倒

He knocked a glass over.

他把玻璃杯打翻了。

2. 使惊奇

She was knocked over by the news.

她被那消息惊呆了。

3. 消除

We have knocked over every difficulty.

我们已排除种种困难。

knock up

1. (使)筋疲力尽

The long journey knocked them up.

长途旅行把他们累坏了。

2. 赚得

His father knocked up over 30000 dollars last year.

他父亲去年挣了三万多美元。