back porch effect [計(jì)算機(jī)科學(xué)技術(shù)]后緣效應(yīng)back porch clamping [電子、通信與自動(dòng)控制技術(shù)]后沿箝位back porch 后沿back pollination [生物學(xué)]回交授粉back pocket 后兜back pnl otr [交通運(yùn)輸工程]后圍外板back pnl assy [交通運(yùn)輸工程]后圍板總成back plate [機(jī)][通信] 背板；擋風(fēng)板；支承板；離合器蓋back pike position [體育]后屈體姿勢(shì)back piece 后擋板，[材] 反向角鋼back pedal 后踏板back payment 逾期支付back pay 欠付工資back patch pocket [紡織科學(xué)技術(shù)]后貼袋back passage 直腸。back pass （足球比賽中故意傳給守門員的）回傳球。back part width [紡織科學(xué)技術(shù)]后踵寬度back part of the shed [機(jī)械工程]梭口后部分back panel trim lower [交通運(yùn)輸工程]行李箱門檻條back panel strip [商業(yè)]背拉檔