adj.来回旅程的

We're planning a round-trip to Paris, leaving next Friday and returning the following Monday.
我们计划一个往返巴黎的行程，下周五出发，下周一返回。
The round-trip fare for the train from New York to Boston is $150.
从纽约到波士顿的往返火车票费用是150美元。
She booked a round-trip flight to London for her business trip.
她预定了往返伦敦的航班，用于商务旅行。
The distance from my house to the office and back is a daily round-trip of 20 miles.
从我家往返办公室每天的距离是20英里。
The astronauts completed a successful round-trip to the International Space Station.
宇航员成功地完成了往返国际空间站的任务。
He decided to make a round-trip hike to the summit of Mount Whitney.
他决定进行一次往返惠特尼山山顶的徒步旅行。
The cost of gas for our weekend round-trip to the beach was quite high.
我们周末往返海滩的汽油费用相当高。
The airline offers a special discount on round-trip tickets for students.
航空公司为学生提供往返机票的特别折扣。
We need to calculate the total time for the round-trip journey to plan our schedule.
我们需要计算往返旅程的总时间来规划日程。
The round-trip journey from Earth to Mars could take up to three years.
从地球往返火星的旅程可能需要长达三年的时间。