Poor sleep has an influence on our memory and learning.

睡眠不好会影响我们的记忆力和学习。

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It's also likely that poor sleep affects emotional regulation.

不良的睡眠也很有可能影响情绪控制。

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Many people believe that poor sleep is a normal part of aging, but it is not.

很多人认为糟糕的睡眠是变老的正常组成部分，其实不然。

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Some patients are misdiagnosed as suffering from depression because many of the symptoms are the same - poor sleep patterns, depressed feelings and pain all over the body.

VOA: special.2011.07.26

They wanted more downtime, and were showing it through frequent tantrums and poor sleep.

FORBES: How To Lift Yourself Out Of Time-Debt

The team also is focusing on why climbers at high altitude experience poor sleep.

WSJ: Mayo Clinic Researchers on Everest Study High Altitude's Effects on the Body

Scientists aren't certain as to why poor sleep in childhood increases the risk of anxiety disorders and depression.

WSJ: How Much Sleep Do Children and Teenagers Need? Grown-Up Problems Start at Bedtime