Backy巴基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backslashn.反斜线符号(\)Backheden巴克赫登back nail平钉backshish津贴backstageadj.在后台；向后台adv.在后台；向后台back bias反偏压,反馈偏压,回授偏压,背面照明back arch拱背,内衬拱,八字砖back stop逆行停止backkwardadv.向后地back Lift[医] 背对背负法