We choose a tandem bicycle because it makes it easier to communicate with each other about interesting people and things we come across during the journey.

我们选择双人自行车是因为它能让我们更容易地对旅途中遇到的有趣的人和事进行交流。

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Bicycle and car production grew pretty much in tandem in the two decades beginning in 1950.

自1950年到1970年的20年间，自行车和汽车产量均有较大增长。

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Bicycle and car production grew pretty much in tandem in the two decades beginning in 1950. But since 1970 bike production has nearly quadrupled while car production has roughly doubled.

自1950以来的20年的时间里，自行车和汽车的产量增长大致相当均有很大的增长，但是，自1970年开始，自行车的产量几乎翻了两番，但，汽车的产量却只翻了一番左右。

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