This drift has been studied extensively in many animals and in biological activities ranging from the hatching of fruit fly eggs to wheel running by squirrels.

在许多动物中，以及在诸如果蝇卵的孵化乃至松鼠跑动的转轮这样的生物活动中，这种变化趋势一直受到广泛的研究。

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Running on an exercise wheel, which boosts neurogenesis, also sped the rate at which old memories were cleared from the hippocampus.

在跑轮上面跑可以促进神经发生，同样会加快旧记忆从海马体中清除的速度。

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We have a choice: take effective action or be like a mouse in a wheel, always running, getting nowhere.

我们有得选择：要么做有效的行动，要么像老鼠一样到处乱窜，却哪儿也去不了。

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The open-wheel series is running a second, full-length race in the same weekend for the first time Sunday when Conway will start up front for the first time in his career.

NPR: Conway Wins 1st Of 2 Races At Detroit Grand Prix

Or, you can choose to keep working non-stop like a hamster running on a wheel that keeps going faster and faster.

CNN: Take your vacation, or die?

But if you pressed your face to the glass, as Kendall was doing, you could see the biscuit-colored beach running down to Navy Pier, where they were just now lighting the Ferris wheel.

NEWYORKER: Great Experiment