upper lip上嘴唇upperadj.较高的；上面的；上部的n.鞋帮；上铺n.兴奋剂；令人兴奋的经历upper insulator gasket上部绝缘密封垫upper flange of girder大梁上翼缘upper injection system上部送风系统Upper ureteric calculi输尿管上段结石upper alimentary tract上消化道upper part of register寄存器的高位部分uppersideband spectrum上边带频谱upper and lower bounds上下界upper faucial swelling喉单upper bicuspid forceps上颌双尖牙钳