They might sleep in the day and work at night for example - which goes against the light-dark pattern.

例如，他们也许要在白天睡觉，晚上工作，这和昼夜循环相冲突。

youdao

How long do giraffes living in the wild sleep every day?

在野外生活的长颈鹿每天要睡多久？

youdao

In places like Bali and New Guinea, people tend to slip in and out of sleep as they need it, napping more during the day, and getting up more at night.

在有些地方，例如巴厘岛和新几内亚，人们喜欢随时根据需要进入睡眠和醒来，白天时不时的打个盹儿，晚上却经常的爬起来不睡觉。

youdao

A new mother,for example, quickly learns to try to sleep when her baby is quiet, even in the middle of the day.

VOA: special.2010.01.31

You could have--you know, snuck into my house, watched my body go to sleep, get up in the morning, follow the body around over the course the day, see it go to sleep again.

你可以偷偷地，溜进我家，看着我的肉体入睡，早上又醒来，你可以跟着我的肉体整天到处跑，到晚上再看着它入睡。

耶鲁公开课 - 死亡课程节选

And then you do twenty-plus miles the next day,you sleep in a tent, you gotta wake up and you got to do it again.

VOA: special.2009.11.02

They had been planning to attend political training classes and participate in group activities during the day and sleep in tents at night, he said.

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Since 2010, the Zambezi has offered an alternative safari experience: instead of staying in a lodge at night and venturing out into the gameparks in jeeps by day, travellers eat, sleep and breathe the life of the floodplains.

BBC: Safari by water in southern Africa

If snoring is combined with feeling sleepy during the day and experiencing pauses in breathing during sleep, people may be suffering from the more serious sleep apnoea - which affects 10 to 20% of snorers - and should see their GP.

BBC: Snoring cures success 'exaggerated'