1.
Trading ships plied the routes Between coastal ports.
商船定期往返航行于港口之间
2.
For the next four years he steamed up and down the Mississippi.
此后四年中，他往返航行于密西西比河上。
3.
consecutive return trip cp
连续往返航次租船合同
4.
After being in the water for hours, our yacht beat about and sailed for home.
出海航行了几时后，我们掉转游艇返航。
5.
go on a voyage from Mombasa to Goa
由蒙巴萨航行前往果阿
6.
on the outward/homeward voyage
在出航[返航]途中
7.
The trial pilot is heading triumphantly for home.
那个试飞飞行员正向基地胜利返航。
8.
a spacecraft in re-entry mode
处于重返大气层运行中的航天器
9.
Back and forth
来回,往返,来来往往地
10.
(4) issue permits to foreign airlines for services other than those to, from or through the mainland of China.
（四）对外国航空公司除往返、经停中国内地的航班以外的其他航班签发许可证。
11.
The pilot could not return because the airfield had fogged up
那个飞行员因机场被浓雾笼罩而不能返航。
12.
Discussion on the Pilots’ "Collective Returning" Event from the Standpoint of the New Institutional Economics;
从新制度经济学的角度看飞行员集体返航事件
13.
Reentry Trajectory Optimization for Manned Deep Space Exploration
载人航天器深空飞行返回再入轨迹优化
14.
The wave is to reinforce itself after one round trip.
在一个往返行程之后，波浪加强了其自身的力量。
15.
There is a shuttle service between the city center and the air station.
在市中心和飞机场之间有往返的穿梭运行班车。
16.
Buses go to and fro between the center of the city and the city limits.
公共汽车往返行驶于市中心和城市边缘之间。
17.
shuttle train
[美]短程往返火车
18.
One way or round way?
单程还是往返程? ?