ka·zoo /kəˈzu/
  一種木製或金屬制玩具笛子
  ka·zoo n.  A kind of toy or rude musical instrument, as a tube inside of which is a stretched string or membrane made to vibrate by singing or humming into the tube.
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  kazoo
       n : a toy wind instrument that has a membrane that makes a sound
           when you hum into the mouthpiece