back office microsoft [計(jì)算機(jī)科學(xué)技術(shù)]公司的一種軟件包back office 后勤辦公室；后勤部門(mén)；股票或證券交易清算室back off point [能源科學(xué)技術(shù)]倒開(kāi)點(diǎn)back off (v.) back off 后退；軟化；減輕；卸下back of tooth [機(jī)] 齒背back of the knee 膝彎back of the hand [醫(yī)藥科學(xué)]手背back of lode [地球科學(xué)]礦脈頂back of house 場(chǎng)館工作區(qū)back of head 頭后部back of beyond back of a tooth 齒背back of 在…后面；在…背后back oars [交通運(yùn)輸工程]倒劃，逆搖back numbers back number back noise 背景噪聲，本底噪聲back nine [體育]后九洞back neck line [紡織科學(xué)技術(shù)]后領(lǐng)圓線