往复运动

wǎng fù yùn dòng

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释义

  1. 1. backwards and forwards action (e.g. of piston or pump)
  2. 2. reciprocating motion

往复运动 的构成词

动
dòng

(of sth) to move

往
wǎng

to go (in a direction)

运
yùn

to move

运动
yùn dòng

to move

往复
wǎng fù

to go and come back

复
fù

to go and return