backshaft n.後軸backsetting 收進backsetbed [能源科學(xué)技術(shù)]後積層backset eddy [能源科學(xué)技術(shù)]逆渦流[地球科學(xué)]逆漩渦backset n.倒退；逆流；渦流backseattered [機] 反曏散射的backseats 上密封backseat of a greyhound bus backseat driver 指手劃腳的人backseat n.後座；次要位置=back seat.backscrolling n.反曏滾動backscratching 互相利用backscratcher (n.) backscratcher n.長柄扒backscour n.反曏沖刷backscatteringangle [能源科學(xué)技術(shù)]反曏散射角backscattering technique 逆散射法backscattering spectrometry 後散射能譜測定法backscattering spectrometer [經(jīng)濟學(xué)]反曏散射能譜儀backscattering lidar [地球科學(xué)]反散射光達後曏散射激光雷達