Mexicana Airlines has announced cheaper round-trip tickets between Los Angeles and cities it serves in Mexico.

墨西哥航空公司已宣布降价出售从洛杉矶到该公司设有航班的墨西哥各城市的往返机票。

Two round-trip tickets please!

请给我两张往返票！

It was a Pan am flight round-trip to Miami, Florida.

这是一张泛美航空公司飞往佛罗里达州迈阿密的往返机票。

B. Free round-trip transportation to the hospital is available.

免费的到医院的交通服务。

Another conversion approach is called the round-trip conversion.

另一种转换方法称作往返转换。