航程: air-range; sail; flying rang ...往返时间: round-trip time往返时间: round tritime (rtt); round-tritime; rtt round tritime固定往返时间: frtt fixed round-tritime信号往返时间: rtt round tritime往返时间,环程时间: round-tritime信号往返时间滞后: signal roundtrip time delay往返时延: rtd round-trip-delay往返时间, 来回一次时间, 循环时间: round trip time短程往返火车: doodlebug回声往返时延: echo round trip delay空中短程往返服务: air shuttle service往返航程: double journey; round trip; round voyage; roundtrip; roundvoyage往返航程租船合同: round charter; round tricharter往返程时间: round tritime航程时间: track time; trip time往返传播时间: round trip propagation time,往返跃迁时间: round-tritransit time航程延长时间: period of prolongation of voyage预计航程时间: estimated elapse time往返周期, 往返行程时间: round trip cycle往返行程延迟时间: round trip delay time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航程与续航时间: range and endurance航程: air-range; sail; flying range; voyage; passage; range 由伦敦至澳大利亚的航程 a voyage from london to australia