round-trip的用法和樣例：
辭彙搭配
- round-trip ticket 往返票
- round trip echoes 往複回波
- round-trip lease 往返租賃
- round trip delay time 環程延遲時間...
- round trip propagation time 往返傳播時間...
- round trip cycle 往返周期,往返行程時...
- round trip delay 往返行程時延...
- round trip transmission delay 往返傳輸時延...
- round trip 往返旅行
- round trip lease 往返程租賃
- echo round trip delay 回聲往返時延...
- round trip echo 多次反射回波...
- round trip transmission [計] 往返傳輸...
- round-trip fare 周遊票價; 來回票價...
