Passengers carry documents on behalf of a company in return for a discounted, or free (though rarely), round trip.
携带公司证明文件的乘客可以换取折扣或者免费（虽然很罕见）的往返机票。
Recently, some passengers said, buy the same Airlines round-trip ticket, but did not catch the plane trip, return ticket can not use the normal.
近日，有旅客表示，购买同一航空公司的往返套票，但没赶上去程飞机，返程机票也无法正常使用了。
To buy a round-trip ticket, not to take the process, also cannot use the return.
购买往返飞机票，未乘去程，返程也无法使用。
Since we planned to return home after two weeks in Thailand, we made sure that we bought round-trip tickets.
因为我们打算在泰国待两星期后就回国，所以我们确认有买到来回机票。
Since we planned to return home after two weeks in Thailand, we made sure that we bought round-trip tickets.
因为我们打算在泰国待两星期后就回国，所以我们确认有买到来回机票。
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