名词（固定在门上供敲门用的）门环；吹毛求疵的人；一味批评的人；奶子网络挨户敲门的推销员；敲击者；敲门者
1. up to the knocker : 完全地, 十分地, 无可非议地；
名词
1. There was nothing particular about the knocker on the door, except that it was very large.
门上的门环没有什么特别的，只是很大而已。
2. At the rat-a-tat of the knocker her heart flew into her mouth.
听到敲击者咚咚声她的心都悬起来了。
3. 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。
4. She is tall with large knockers.
她很高，有一对大乳房。
3. 挑剔的人：knob 按钮 | knocker 挑剔的人 | knowability 可知性
4. 敲门者：knocked-down 未装配的 | knocker 敲门者 | knocking 爆震音
1. （固定在门上供敲门用的）门环
A knocker is a piece of metal on the front door of a building, which you use to hit the door in order to attract the attention of the people inside.