If someone receives a call during sleeping hours, he assumes it is a matter of life or death.

如果某人在睡觉时接到一个电话，他会认为那是件生死攸关的事情。

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If someone receives a call during sleeping hours, he may think that it's a matter of life and death.

如果有人在睡觉时间接到电话，可能会认为那是生死攸关的事情。

youdao

The utility model has the advantage that the deformation of the hair style can be prevented during sleeping.

在睡眠时戴上它，可防止发型变形。

youdao

Gato Island, a 40-minute boat ride from Malapascua, is home to delicate seahorses, kaleidoscopic fish and multi-hued corals, as well as a labyrinth-like cave where whitetip sharks are often spotted sleeping during the day.

BBC: Swimming with sharks in the Philippines

None of them had the energy to visit any sights in Bangkok during their layover, sleeping instead in the hotel provided by the airline.

NPR: Excerpt: 'Unaccustomed Earth'

They are mostly diurnal - sleeping at night and active during the day.

BBC: Escaped coati still missing from Belfast Zoo