Backne巴克内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backstitchn.倒缝v.倒缝back power反向功率back putty打底油灰back fence后篱笆backs play卫线战术back block后座房屋back bones背骨back sb up支持某人back cloth背景幕back flush反向冲洗