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1·He was knocked down by a bus.

他被公共汽车撞倒了。《牛津词典》

2·He knocked three times and waited.

他敲了三下门就等着。《牛津词典》

3·A car knocked him over.

一辆汽车把他撞倒了。《柯林斯英汉双解大词典》

4·I knocked but there was no one around.

我敲了门，但是没有人应门。《牛津词典》

5·He got knocked out in the first inning.

他在第1局就被淘汰了。《柯林斯英汉双解大词典》

6·As was his custom, he knocked three times.

他敲了三下，这是他的习惯。《牛津词典》

7·I knocked on the door but nobody answered.

我敲了门，但无人应答。《牛津词典》

8·He died after being knocked down by a car.

他被一辆汽车撞倒后死了。《柯林斯英汉双解大词典》

9·Just then, someone knocked at the front door.

就在那时，大门口有人敲门。《牛津词典》

10·Carol answered the door as soon as I knocked.

我刚敲过门，卡罗尔就把门打开了。《柯林斯英汉双解大词典》

敲

1·He had rushed out of his room and knocked his neighbour's door.

连忙出门去敲邻居的门。

2·Oliver is now studying tumors in which the PIDD gene has been knocked out, to see if its absence hinders drug resistance.

Oliver现在研究PIDD基因敲除的肿瘤细胞，看看是否它的缺失阻碍药物耐药性。

3·This line of research started when Yeh and colleagues knocked SENP2 out of mouse DNA and found that the embryos died at about day 10.

本系列研究开始于叶和同事敲除小鼠胚胎dna的SENP2，发现胚胎在大约10天死亡。

4·Thee COINS are usually knocked into felled tree trunks using stones by passers-by, who hope it will bring them good fortune.

这些硬币通常是路人用石头敲进采伐木的树干的，希望以此带来好运。闀。

5·The next step, say the researchers, is to find out what happens when the RSOP1 gene is knocked out of mice.

研究人员说，下一步实验将研究敲除小鼠RSOP1基因后产生的变化。

撞了

1·Xiao Zhang was knocked off his bicycle by a taxi on his way home from school.

小张在从学校回家的路上被一辆出租车从自行车上撞了下来。

(1)knocked down撞到；拆装的；拍板成交；降低价格

(1)knocked out喝醉；神志不清；被麻醉