Why doesn't he just knock the wall down?

Run for the doctor and knock him up.

快去请医生,把他叫起来.

Try not to knock that vase over.

小心别把花瓶碰倒了。

They came into the front hall, stamping their boots and jumping up and down to knock the snow off.

他们进入了前厅，跺着靴子，蹦跳着抖掉身上的雪。

Singing to a half of the stick when it comes to knock about with the strange.

吟唱到一半的时候还用杖敲一下怪.

I used to knock about with all the lads from round where Mum lives.

我过去常同妈妈住所周围的伙伴们一起玩儿。

Most of the people I knock about with are in the union.

大部分和我有联系的人都在这联盟.

Those tramp steamers knock about southeast Asia.

那些不定期货船在东南亚一带往来行驶.

Mary bought his son a toy dog to knock about with.

玛丽给儿子买了只玩具狗玩.

We just want to go to Beijing and knock about for a few days.

我们想去北京,在那儿几天到处逛逛.

They heard a knock at the front door.

他们听到前门有人敲门。

The global economy has taken a serious knock, at huge human cost.

全球经济遭受了严重的打击, 人们为此付出了巨大代价.

They both heard a knock at the side-door.

他们俩都听见有人敲侧门.

There had been a knock at the door and when she opened it she locked herself out.

外面有敲门声，她去开门，结果把自己反锁在了外面。

I was preparing for bed when I heard a knock at the door.

我正准备睡觉时听到有人敲门.

On cue, there was a knock at the door.

正在这个时候, 有人敲门.

Did I hear a knock at the door?

是有人敲门 吗 ?

There was a treble knock at the door.

门上响起了三声敲门声.

There was a very quiet knock at the door.

有人轻声叩门.

There was a knock at the door. Someone had come looking for me.

门外又敲门了, 找我的.

Whlie he was writing postcards, he heard a knock at the door.

他在写明信片时, 听到了敲门声.