knock over 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 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.
