n.敲击者；敲门者；门环；挑剔的人
(复）knockers: 乳房
At the rat-a-tat of the knocker her heart fly into her mouth. 听到敲击者咚咚声她的心都悬起来了。
The elder of the men lifted the knocker and rapped. 年纪较老的那个男人提起门环来敲了几下。
When he put his key in the lock of the door, he did not see a knocker. 当他把钥匙插入门锁时,并没有看到门环。
What a knocker he is; no matter what we suggest, he finds fault with it. 他真是个吹毛求疵的人,不管我们提议什么他都能挑出毛病来。
n. 一对乳房(用此词会冒犯女性)
n.门环
