词语上下运动
解释up and down movement
up and down movement〔名词〕上下运动详细»
up and down movement〔名词〕升降运动详细»
上下运动seesaw;yo yoing;yoyoing详细»
上下运动seesaw;seesaw motion;up and down motion详细»
上下运动superiot-inferior movement详细»