Today many teenagers are unhealthy, because they do less exercise eat more junk food isn't enough time to sleep.
如今很多年轻人的身体都不健康，因为他们做太少的运动吃太多的垃圾食品，并且没有足够的睡眠。
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Studies from Berkeley have shown that lack of sleep can lead to junk food cravings, so sneaking in that extra hour of rest can help keep your body craving the right nutrients it needs.