lowerleg足loweradj.低的；下级的；下层的v.降低；减弱；跌落lower one's shoulders落肩lower grade resources低品位资源lower elastic modulus低弹模lower Cambrian series下寒武统lower shearing stress低剪切力lower Jurassic series下侏罗统lower back cellulitis下搭手, 连肾发, 肾俞发lowering of amplitude振幅降低lower river cofferdam下游围坝Lower digestive tract下消化道