英汉解释

n. 门环；敲击者；吹毛求疵的人

同义词

n. boob，depreciator，detractor，doorknocker

参考例句

1. Number 30 has a red door and a brass knocker.
30号有一扇红门和一幅铜门环。
2. The elder of the men lifted the knocker and rapped.
年纪较老的那个男人提起门锤来敲了几下。
3. One that raps or strikes, especially a door knocker.
'敲击'。''者''。'敲击'。''或打击的人，尤指敲门者。

英英解释

n.
  1. (Yiddish) a big shot who knows it and acts that way; a boastful immoderate person
  2. a person who knocks (as seeking to gain admittance)
  3. one who disparages or belittles the worth of something
  4. either of two soft fleshy milk-secreting glandular organs on the chest of a woman
  5. a device (usually metal and ornamental) attached by a hinge to a door

网络释义

knocker
上门推销员; 门环; 冲击器; 挑剔的人;
door knocker
门环; 门跋; 黄铜门扣; 印度采购;
coke knocker
除焦机;
wooden knocker
木鱼;
shell knocker
敲击器; 敲击器,敲击器;