我要经济舱，回程时间不定的往返票。

I'll need an economy ticket with an open return.

youdao

我要经济舱，回程时间不定的来回票。

I'll need an economy ticket with an open return.

youdao

他要等很长的时间才可以等到回程的火车。

He has to wait a long time fa train going back.

youdao

他要等很长的时间才可以等到回程的火车。

He has to wait a long time fa train going back.

youdao