No wonder some animals spend about a quarter of their time pacing. But how did scientists figure out that this was the problem?

难怪有些动物会花费四分之一的时间溜达。但是科学家是怎么发现这些问题的呢？

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If you were going to run a triathlon, you would spend more time improving your endurance and pacing yourself then sitting on the bench writing out the timing for your swimming, running and biking.

如果你想参加三项全能比赛，你会花更多的时间提高耐力、为自己定速度，然后会坐在长椅上分别写下游泳、跑步和骑自行车的时间安排。

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While we are pacing into the future, we are leaving, at the same time, a lot of things behind.

当我们大步迈向未来时，同时我们也将许多东西留在了身后。

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Each store is like a treasure chest, making for a much more enjoyable time than pacing the aisles of Walmart or Target.

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For heavens sake, once upon a time, politicians solved quarrels by pacing off and firing guns at one another.

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