有些十几岁的孩子不得不在父母双方之间来回旅行，这不论对社会还是在实际操作的层面上都是一个挑战。
Some teens have to travel between parents, and that can create challenges both socially and practically.
旅行和交流的便利，再加上更宽松的国界，使得游者、员工、流浪旅行者和无国籍漂流者络绎不绝的来回穿梭。
The ease of travel and communication, combined with the looser borders, gives rise to endless crisscrossing streams of wanderers and guest workers, nomadic adventurers and international drifters.
要是你有一张来回票可以乘坐时间机器旅行到过去或将来的任何地方的话，你会想去吗？
If you could have a round-trip ride in a time machine and travel any distance into the past or future, where would you want to go?
你可能会找到一个长途旅行的好计划但是却发现你累积的里程点数不够换取来回机票。
You might find a good deal on long-distance travel but discover your frequent-flyer miles don't quite cover the costs.
单程票价25元，周末旅行来回票价45元。
此外，远程办公可以使工人旅行来回工作的日常家务。
Furthermore, telecommuting can spare workers the everyday chore of traveling back and forth to work.
吉斯伯恩附近的平原与高山有许多有趣而独一无二的地方，可以让你进行一天来回的短途旅行或野餐。
The flats and hill country surrounding Gisborne provide many interesting and unique places to visit on day trips and picnics.
旅行社：当然。这套行程包括巴黎来回机票、住宿、餐饮及市区的交通。
Certainly. The package includes air travel to and from Paris, accommodations, meals and transportation around the city.
歇洛克·福尔摩斯正在月台上来回踱步，身穿一件长长的灰色旅行斗篷，头戴一顶紧贴脑袋的便帽，原本瘦长的身形便显得更瘦更长。
Sherlock Holmes was pacing up and down the platform, his tall, gaunt figure made even gaunter and taller by his long grey travelling-cloak and close-fitting cloth cap.
歇洛克·福尔摩斯正在月台上来回踱步，身穿一件长长的灰色旅行斗篷，头戴一顶紧贴脑袋的便帽，原本瘦长的身形便显得更瘦更长。
Sherlock Holmes was pacing up and down the platform, his tall, gaunt figure made even gaunter and taller by his long grey travelling-cloak and close-fitting cloth cap.
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