词语up and down movement
解释上下运动
词性名词
up and down movement〔名词〕升降运动详细»
上下运动up and down movement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»