Why We Need Sleep

Most adults need between seven and nine hours of sleep every night.

大多數成年人每晚需要七到九個小時的睡眠。

Yet many people regularly get much less than that.

然而，許多人經常睡得比這少很多。

While we sleep, the brain sorts and stores what we learned during the day.

我們睡覺的時候，大腦會整理並儲存白天所學到的東西。

This is why a good night's sleep before an exam is so important.

這就是為什麼考試前睡個好覺如此重要。

Sleep also gives the body time to repair muscles and fight illness.

睡眠也讓身體有時間修復肌肉、對抗疾病。

People who sleep badly often find it harder to concentrate and control their mood.

睡不好的人往往更難專心，也更難控制情緒。

Over time, poor sleep can increase the risk of serious health problems.

久而久之，睡眠品質不佳會增加發生嚴重健康問題的風險。

Experts recommend going to bed and waking up at the same time every day.

專家建議每天在同一時間上床睡覺和起床。

Keeping the bedroom dark, quiet and cool can also make a big difference.

讓臥室保持昏暗、安靜、涼爽，也能帶來很大的改變。