knock out

verb

1. destroy or break forcefully

e.g. The windows were knocked out

2. empty (as of tobacco) by knocking out

e.g. knocked out a pipe

3. eliminate

e.g. knock out a target

4. knock unconscious or senseless

e.g. the boxing champion knocked out his opponent in a few seconds

Synonym: knock coldkayo

5. overwhelm with admiration

e.g. All the guys were knocked out by her charm

1. 使不省人事；使入睡
To knock someone out means to cause them to become unconscious or to go to sleep.

e.g. He was arguing with his girlfriend and she hit him with a frying pan! Nearly knocked him out...
他和女友争吵时女友竟拿煎锅砸他！几乎把他砸晕了过去。
e.g. The three drinks knocked him out...
3杯酒就让他昏昏入睡了。

2. 击败；淘汰
If a person or team is knocked out of a competition, they are defeated in a game, so that they take no more part in the competition.

e.g. Henri Leconte has been knocked out in the quarter-finals of the Geneva Open...
亨利·勒孔特在日内瓦公开赛四分之一决赛中被淘汰。
e.g. The Irish came so close to knocking England out of the European Championships.
爱尔兰队险些将英格兰队从欧锦赛中淘汰出局。

3. 摧毁；使瘫痪
If something is knocked out by enemy action or bad weather, it is destroyed or stops functioning because of it.

e.g. Our bombers have knocked out the mobile launchers...
我们的轰炸机摧毁了移动火箭发射台。
e.g. A storm has made roads treacherous and knocked out power.
一场暴风雨致使公路隐患重重且电力瘫痪。

1. 击倒：90年代中期,FOSTER等以基因击倒(knock out)的整形技术,获得缺失blrl(blrl-1-)的小鼠,并发现食道癌这种小鼠缺少髂淋巴结,不形成或只形成部分形态不正常的派伊尔氏小结,同时,淋巴两性细胞游走到脾脏滤泡的过程受到严重损坏,

2. 敲空;(拳击中)击倒：knock off 把...敲掉;击倒;停工 | knock out 敲空;(拳击中)击倒 | know about 了解,知道...的情况

3. knock out：ko; 击倒