往返机票的英文可以用round trip air ticket 或者 return ticket。 一、短语 往返机票的订单 Reservation on return ticket 双往返机票 back-to-back 备好往返机票 Air tickets 二、例句 1、往返机票是多少钱 How much is the return ticket? 2、届时，费米项目的科学家们就不只是开香槟庆祝了他们完全可以开始预订到斯德哥尔摩的往返机票。
At that time， Fermi scientists may do more than just uncork the champagne they can startreserving themselves a round-trip ticket to Stockholm. 3、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。
Passengers carry documents on behalf of a company in return for a discounted， or free (thoughrarely)， round trip.
