越向左边拖动滑条，滤镜效果的强度就会越弱。

The farther you drag, the less the intensity of the effect.

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而此次研究观察的是断断续续的，但是不比正常睡眠时间短或强度弱的睡眠。

This study looked at sleep that was fragmented, but not shorter or less intense than normal for the mice.

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记住要遵循强-弱的规则——如果今天你上强度了，那么明天就应当休息或者很轻松的恢复性跑。

Always use the hard-easy rule - if you run hard one day, rest or do a very easy recovery run the next.

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