variable motion〔名词〕变速运动详细»
variable motion〔名词〕变速运动详细»
变速运动motion with variable velocity;non uniforme motion;variable motion详细»
变速运动motion with variable velocity详细»
变速运动motion with variable velocity;non-uniform motion;variable motion详细»
变速运动motion with variable velocity;variable motion;variable speed motion详细»