As the human study suggests, another reason for dolphins keeping their eyes open during sleep is that they can look out for predators while asleep.

正如人类研究表明的那样，海豚在睡觉时睁着眼睛的另一个原因是，它们可以在睡觉时留意捕食者。

youdao

He had picked her up while asleep and she had woken suddenly and lashed out.

他在狗睡觉时抱起了它，狗突然惊醒并咬了一口。

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Babies can apparently learn even while asleep, according to a 2010 study.

2010年的一项研究显示，宝贝们显然在睡着的时候也能学习。

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While most people are still asleep, he and his helpers prepare a meal every weekday for more than 200 people.

VOA: special.2009.01.28

One possible explanation, the dualist, that's the ghost of your mother, immaterial soul that she is, communicating to you while you're asleep.

一个可能的解释,二元论者会说,那是你妈妈的鬼魂,她是一个非物质的灵魂,在你睡觉的时候跟你交流

耶鲁公开课 - 死亡课程节选

We might say, look, while you're asleep, it's true that you're not P-functioning.

我们可以说，看，当你睡着时，确实没有人格功能性。

耶鲁公开课 - 死亡课程节选

Downloading lessons into the brain might sound like sci-fi, but technology that activates neural patterns might soon help us practice while asleep.

FORBES: Downloadable Learning -- Matrix Style: Welcome to Education's Laziest Frontier

They can be as small as opening your eyes while asleep or, at the very extreme end, driving a car while sleeping.

BBC: Sleep: Weird things people do in their sleep

Anderson has even treated someone who carefully dismantled grandfather clocks while asleep.

BBC: Sleep: Weird things people do in their sleep