往复运动 wǎngfùyùndòng reciprocating motion Origin Definitions Defs Strokes Stroke Words Sentences Sents 往复 往復 wǎngfù to go back and forth to move back and forth; to make a return trip; to reciprocate (as of machine parts)运动 運動 yùndòng verbnoun movement movement; motion; the change of position of an object in space