名词
中文翻译：往返票
同义词：
['round-trip ticket', 'return ticket']
例句：
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1. We need to buy a round-trip ticket to travel between the twocities.
我们需要买一张往返票以便在两个城市之间旅行。
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2. The airline offers discounted round-trip tickets for students.
航空公司为学生提供打折的往返票。
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3. Thetrain has a schedule that allows passengers totake a round-trip ticket from onecity to another.
火车有一班时间表，乘客可以购买从一座城市到另一座城市的往返票。