You’d think the human race would have sleep down to a science by now, but many of us are still sleeping poorly (and so we need top 10 guides to getting better sleep). Part of the problem is we have outdated information and beliefs about this all-important health need. Let’s set the facts straight. Here are 10 things you might have been told about sleep but aren’t completely true.
你覺得人類已經對睡眠了解得很透徹了，但是仍然有很多人睡不好覺（所以我們需要睡眠十大指南）。一部分問題是，睡眠對我們的健康如此重要，但我們掌握的信息和對它的了解已經過時了。來，讓我們把事實弄清楚。下面列舉了你可能聽說過的有關睡眠的十件事，這些都不是完全正確的。

10. More Sleep Is Better for You
10. 睡得越多越好

There could be such a thing as too much sleep. The amount of sleep we need varies by person and also changes as we age. Harvard researchers found that a lot of sleep (9 hours or more) is linked with poor sleep quality. So don’t aim for more sleep—even on the weekends. Aim for better sleep.
睡太多可能會導致睡眠過度。每個人需要的睡眠時間都不一樣，且會隨著年齡增長而變化。哈佛大學研究員發現，睡得過多（9個小時以上）和睡眠質量差有關。所以不要以睡得更久為目標——即便是在周末，而是要力圖提升睡眠質量。