The lack of sleep caught up with her, and she began to doze off.

睡眠不足开始影响她了，她打起了瞌睡。

youdao

Despite the lack of sleep, Richard is only slightly out of breath.

尽管没有得到休息，理查德也只是有点儿气喘而已。

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Scientists believe the lack of sleep causes your brain to run on empty.

科学家认为缺乏睡眠会把大脑累坏，因为大脑一直在提取并储存信息。

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Kathy in Canada wrote: My daughter likes complaining about everything in the morning, and I know that this is from lack of sleep.

VOA: special.2010.10.14

When it comes to work, we live in a society that values the lack of sleep.

FORBES: Three Reasons You Need More Sleep

Jackie Sanders says the combination of physical and emotional strain, combined with the lack of sleep, can take its toll.

BBC: 'Always on edge' - a carer's life

Maybe it was the lack of sleep, or that expectations had been exceeded, but there was a whiff of triumph in the post-summit statements at 4am last Thursday.

BBC: Europe after the euphoria