con·tra·bass /ˈkɑntrəˌbes/
  (a.)最低音的最低音弦樂器
  Con·tra·bass n. Mus. The lowest stringed instrument of the violin family; the double bass; -- also applied to any instrument of the same deep range as the stringed double bass; as, the contrabass ophicleide; the contrabass tuba or bombardon.
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  contrabass
       adj : pitched an octave below normal bass instrumental or vocal
             range; "contrabass or double-bass clarinet" [syn: double-bass]
       n : largest and lowest member of the violin family [syn: bass
           fiddle, bass viol, bull fiddle, double bass, string
           bass]