Keep healthy habits such as eating a healthy diet, exercising and getting enough sleep.

保持健康的习惯，比如健康饮食、锻炼身体和睡眠充足。

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Getting enough sleep at night allows us to keep our heart health. You will have a healthier heart if you can get at least 7 hours of sleep every night.

晚上得到充足的睡眠可以让我们保持健康，同时，如果每晚能保证至少7个小时的睡眠，你将拥有一颗健康的心脏。

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Number of teens losing sleep to late-night technology use is enough to keep parents and researchers up at night.

大多青少年熬夜玩弄高科技这一现象足以让父母和研究人员夜不能寐。

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It's an enzyme called tryptophan which helps you manufacture enough serotonin so that you can sleep when you need to and it helps keep you alert and able to concentrate.

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