ring·er /ˈrɪŋɚ/
  套環,投環,按鈴者,敲鐘者
  ringer
  電鈴,振鈴器
  ringer
  振鈴器
  Ring·er n.
  1. One who, or that which, rings; especially, one who rings chimes on bells.
  2. Mining A crowbar.
  Ring·er n. Horse Racing A horse that is not entitled to take part in a race, but is fraudulently got into it.
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  ringer
       n 1: a person who rings church bells (as for summoning the
            congregation) [syn: toller, bell ringer]
       2: a person who is almost identical to another [syn: dead
          ringer, clone]
       3: a contestant entered in a competition under false pretenses
       4: (horseshoes) the successful throw of a horseshoe or quoit so
          as to encircle a stake or peg