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 frame［摄］安片框back end whip甩尾back regulate回调back annlysis反演分析backarc basinn.弧后盆地back up block支撑块back-strain背劳损backthrustingn.背逆断层作用back fascitis背肌筋膜炎back chipping背面錾平,清根