0 a metal object attached to a door that visitors use to hit the door in order to attract attention -- （装在门上供人敲门用的）门环
1 a person who is always criticizing someone or something -- 吹毛求疵的人，一味批评的人
2 a woman's breasts. Some people consider this word offensive. -- （冒犯性用语）乳房，奶子
