短程: short distance; short range; ...往返: go there and back; come and ...火车: train空中短程往返服务: air shuttle service航程往返时间: round-trip time短程火车: shuttle train往返市际间的火车: such a train coach etc短程: short distance; short range; trip往返: 1.(来回) go there and back; come and go; arrive and depart 往返要四个小时。it takes four hours to go there and back.2.(反复) journey to and fro 往返于京津之间 travel to and fro between beijing and tianjin; 往返奔波 ceaselessly come and go; 往返航程 round voyage; 往返贸易 countertrade; 往返时间 round-trip time; 往返运费 freight out and home火车: train 乘火车 go by train; 火车车厢 railway carriage; railroad car; setout; 火车渡轮[轮渡] train ferry; 火车机车 (railway) engine; locomotive; 火车票 railway ticket; 火车上交货价 free on rail; f.o.b. train; 火车时刻表 railway timetable; train schedule; 火车司机 engine driver; (locomotive) engineer; engineman; hogger; runner; 火车司炉 bakehead [俚语]; 火车头 engine; locomotive; iron horse; [俚语] pig; 火车卧铺铺位couchette; 火车站 railway station; 火车站台 station platform变形程往复泵: variable stroke reciprocating pump; vertical barrel pump变行程往复泵: rocker arm pump长程往复络纱: long traverse winding可操纵重返火箭: manoeuvrable re-entry vehicle短程场: short-range field短程船: short range ship短程的: geodetic; short distance; short haul; short range; short-range短程力: short range force; short-range force短程线: geodesic短程序: short range order; shortrangeorder短程圆。: geodesic circle旅行;短程: trip最短程: minimal path往返, 来回: out and home往返,来来: back and forth