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。
One way or round way?
单程还是往返程? ?
shuttle train
[美]短程往返火车
Would you want one way or round trip?
是单程的还是往返的？
Sure. One-way or round-way?
可以，单程还是往返？
You want to buy a single fare or a round trip ticket?
你买单程票还是往返票？
Do you want a single or a return ticket?
你要单程票还是往返票?
I want a first-class open return.
我想要一张回程不定期的头等往返票。
journeys to and fro between London and Paris
伦敦与巴黎之间的往返旅程.
I'll need an economy ticket with an open return.
我要经济舱，回程时间不定的往返票。?
B: You want to buy a single fare or round trip ticket?
乙：您买单程票还是买往返票?
Do you want to buy a single fare or a round-trip ticket?
你想买单程票还是往返票？
Do you want a one-way or round-trip ticket?
你要单程车票还是往返车票？
It's dollars one way or fify-five dollars round trip.
单程票是30美元，往返票是美元。
It's 30 dollars one way or fify-five dollars round trip.
单程票是30美元，往返票是55美元。
Helen: Six dollars for one-way ticket, or ten dollars for a round-trip ticket.
海伦:单程六美元，往返票十美元。
Trading ships plied the routes Between coastal ports.
商船定期往返航行于港口之间
During their lives, they fly the equivalent of 50 return trips to the moon: more than 10 million miles.
它们一生的行程约有一千多万英里，相当于往返地球与月球之间50次。