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I assume you two had a long history, went to college together, backpacked through Europe.
你们俩应该认识很久了吧，一起上大学 一起背包游欧洲。
《Desperate Housewives Season 8》《绝望主妇 第八季》
双语例句
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I backpacked through South East Asia last year.
去年我去东南亚背包旅行了。