knocker [ˈnɑ:kə(r)]

例句:

• I felt loath to sully the gleaming brass knocker by handling it.
  我不愿意伸手去抓那闪亮的黄铜门环，怕把它弄脏。
  
• Number 30 has a red door and a brass knocker.
  30号有一扇红门和一幅铜门环.
  
• The knocker is oblong in shape, and of the kind our ancestors called " jaquemart ".
  铁锤是长方形的, 象 古时 的钟锤.
  
• I...rapped, with an upper-crust rap, on the knocker.
  来自M. Amis
• In Herr Braun's cellar the husbands heard the knocker hammering overhead.
  来自G. Greene
• He was that kind of knocker.
  来自NEWYORKER