backemfn.反电动势
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-surface mirror后表面反射镜
Back In The Dog House
Back-Paschen effect巴克-帕邢效应
Backtracking approach回溯法
back vault over horse背腾越跳马
back injection method反注法
back-lash potential反栅极电位
back grey crease mark印花衬布折痕
back resistance meter反向电阻测量计
back-bent occlusion后曲锢囚