Traveler: Yes. How long is the round ticket good for?

游客：是的，返程票多少天内有效？

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With airline fares continuously skyrocketing, this round trip airfare ticket is easily worth about $500.

随着航线票价持续飞涨，这个往返旅行飞机票价很容易价值500美元。

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Man purchasing round trip ticket to board the Statue of Liberty ferry in New York on May 1, 1968. (AP Photo)

1968年5月1日，一个男人购买了前往自由女神像的轮渡的往返船票。

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Look for somebody who's bought a one-way ticket, or look for somebody who's bought a round trip ticket.

NPR: Airport Security Marked by Hassles

There was disappointment, that's why in the opening round of ticket sales we committed to getting as many people who were in those initial ballots across the line.

BBC: New Olympic ticket sales include athletics

Umar Farouk AbdulMutallab, the man accused of trying to blow up a U.S. airliner bound for Detroit, Michigan, had a one-way ticket from Accra, Ghana, to Lagos, Nigeria, and a round-trip ticket for his trip from Lagos to the Netherlands and then to Detroit, according to the Nigerian Aviation Authority.

CNN: Are dogs the key to bomb detection at airports?