It's best to avoid running in the dark but, if you have to run at night, wear reflective gear and light-colored clothing.Dress in bright colors if you're running in the snow.

最好不要在晚上跑步，但是如果非要在夜里跑步的话，穿上浅色的衣物和反光的装备，雪地里跑步时穿亮色的衣物。

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It's best to avoid running in the dark but, if you have to run at night, wear reflective gear and light-colored clothing. Dress in bright colors if you're running in the snow.

最好不要在晚上跑步，但是如果非要在夜里跑步的话，穿上浅色的衣物和反光的装备，雪地里跑步时穿亮色的衣物。

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During the simulant test of gears running - in, the wear type of samples are changed. The rules of the variety are gained.

摘要通过齿轮副跑合的模拟试验，得出齿轮副在跑合过程中磨损形式的转化规律。

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The general rule of thumb is that running backs experience a decline in productivity around the age of 30 due to the wear and tear they undergo.

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Conventional wisdom holds that the pounding from years of running leads to excessive wear and tear on the body as we age, resulting in joint injuries, knee replacements or arthritis.

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