bass               
 noun uk/beɪs/ us/beɪs/  basses
 [ C or U ]低音部;男低音 
the lowest range of musical notes, or a man with a singing voice in this range
  He sings bass. 他唱男低音。 
 Italy's leading bass 意大利头号男低音 
  [ U ]低音;低音键 
the set of low musical sounds on a radio, music system, etc.
  Turn down the bass. 把低音调低。 
  [ C ]低音提琴(同 double bass) 
a  double bass 
  [ C ] (also bass guitar)低音吉他 
an electric guitar with four strings that plays very low notes
  He plays bass guitar. 他弹低音吉他。 
 bass       
adjective [ before noun ] uk/beɪs/ us/beɪs/
 低音的
playing, singing, or producing the lowest range of musical notes
  a bass drum/guitar/trombone 低音鼓/吉他/长号