lowerleg足loweradj.低的；下级的；下层的v.降低；减弱；跌落lower uterine segment子宫下段lower limiting filter高通滤波器lower impression tray下颌印模托盘lower-pressure limit低压极限Lower extremity artery下肢动脉lower metamorphic zone浅变质岩区Lower eyelid ectropion下睑外翻Lower Wuerhe formation下乌尔禾组lower sth. by a rope用绳子放下东西lower ureteral calculi输尿管下段结石