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单词 velocity
释义 velocity
 /veuh los"i tee/,  n.  ,  pl.   velocities.
  1. rapidity of motion or operation; swiftness; speed: a high wind velocity.
  2.  Mech.   the time rate of change of position of a body in a specified direction.
  3. the rate of speed with which something happens; rapidity of action or reaction.
 [1540-50; < L velocitas speed. See VELOCIPEDE, -TY2]
 Syn. 1. See speed.
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