backedadj.有背的；有支持的动词back的过去式和过去分词形式.backn.后面；背脊；靠背；后背；后卫vt.支持；后退adv.向后地adj.向后的；后面的；偏远的；过时的；积欠的back cupping背面受脂back storage备用存储器back-check检查backed weave二重组织backwashingsn.回洗液back up roll支承辊back support后撑back swimmer仰泳蝽back cutting回挖back project从背面放映; 使回想