back stay 后拉索 （蒸汽機車鍋爐的）[建] 背撐back starboard give way port [交通運輸工程]右退左進back star [體育]倒滑起動back stall [藝術學]后座back stairs back stair back stage back squab [交通運輸工程]靠墊back split 從魚背切開back splint 背夾back splice 索尾插接back spindle [機械工程]背主軸back spin back spectacles [動力與電氣工程]里眼鏡[機械工程]里眼鏡back spattering [材料科學]反電潑back space back somersault [體育]直體后空翻back solution [測繪科學技術]反解back slopper [經(jīng)濟學]整坡器back slope 反向斜面；[地質] 后坡