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单词 up-and-down
释义 up-and-down
 —up-and-downness,  n.  
 /up"euhn down"/,  adj.  
  1. moving alternately up and down: the up-and-down swing of levers; an up-and-down tune.
  2. having an uneven surface: up-and-down countryside.
  3. changeable: up-and-down luck.
  4. perpendicular or nearly so: a straight up-and-down hillside.
 [1610-20]
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更新时间:2024/11/10 17:16:21