mediumrare半生的mediumadj.中等的；适中的n.手段；媒介；媒体medium speed mill中速磨煤机medium torn grain中级裂纹medium proportion培养基配比medium soft pitch半软沥青medium of payment支付手段medium lived seed中寿种子medium shear rate中剪切速率medium-contrastn.中等对比度；中等感光度medium toxic dose半数中毒(剂)量medium sized vein中静脉