单词	a slink calf
释义	a slink calf 早产的小牛
随便看	friction and wear test-machine friction and windage loss friction angel friction angle friction-angle friction area friction arm method friction article frictionary friction assembly friction assessment screening test friction assessment screening test machine friction associated damping frictionate frictionating frictionating frictionize friction attachment friction attrition friction augmenting abrasives friction automatic brick press friction axis friction back gear friction bali frictionball friction ball