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单词 up-and-down
释义

WordReference Random House Unabridged Dictionary of American English © 2024
up-and-down  (up′ən doun′),USA pronunciation 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
up′-and-down′ness, n. 

Collins Concise English Dictionary © HarperCollins Publishers::
up-and-down adj
  1. moving, executed, or formed alternately upwards and downwards
 adv , prep up and down
  1. backwards and forwards (along)
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更新时间：2024/11/11 6:00:11