Backusn.巴克斯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backing angle衬垫角铁back up value倒推值Back's method汽车油漆工backseattered[机] 反向散射的backsaw blade钢锯条backing plank衬板back brushing挑顶back-bearer织机后梁back follower随动件back-raking[医] 肛掏粪(由肛门掏挖大便)