Fifthly, you ought to drink less and give up smoking, for alcohol will lead to a bad sleep and stimulative effect of smoking is as same as it of taking a bath with cold water.

第五，少喝酒，别抽烟。酒精能使睡眠不好。抽烟的刺激作用就像用冷水洗澡一样。

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It is widely accepted that having not enough sleep can leave people in a bad mood.

人们普遍认为睡眠不足会让人心情不好。

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A few bad nights is enough to make a person look "especially" more ugly, their sleep experiments show.

他们的睡眠实验表明，几个失眠的夜晚足以让一个人变得“格外”难看。

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According to Agence France Presse, a New Zealand Civil Aviation Authority document said the pilot, who has not been named, had voluntarily submitted a fatigue report, blaming the incident on having a bad night's sleep in London the night before.

BBC: Air New Zealand pilot 'fell asleep' during flight

Is it a good or bad idea to give this supplement to kids whose sleep schedules may be thrown off by a time change or some other factor?

CNN: Should your teen take melatonin for help with sleep?

He is a rumpled but unflappable traveller, seemingly oblivious of bad weather, uncomfortable transportation, and lack of sleep, as well as of the antiwar protesters who tend to appear wherever he goes.

NEWYORKER: The Next Crusade