They are to be admired and pitied, as one would pity and admire a being at once night and day, without eyes beneath his lashes but with a star on his brow.

我们应当赞美并怜悯他们，正如我们同时日夜怜悯又赞美一个人，在他的睫毛下面没有眼睛，只有一颗星星在额上。

youdao

The city, drab and dour by day, is transformed at night.

这座城市白天死气沉沉、单调乏味，晚上就完全变了样。

《牛津词典》

He works at night and sleeps during the day.

他晚上干活，白天睡觉。

《牛津词典》

By day and night,never stopping, biting at his nose, biting at his feet, the wolves stayed with him until the end.

VOA: special.2010.02.27

Well, I would say it's a very different type of environment in the day and at night.

在白天和晚上，这里的环境会有很大不同。

是市民的朋友 - SpeakingMax英语口语达人

Then he had to seek the correct information in the Nautical Almanac about the moon and stars at that time of night or day.

VOA: special.2010.07.14

The aircraft uses video images, infra-red and radar sensors to locate targets at day and night.

BBC: News | In Depth | Military Fact Files

"I used to play a game of basketball in Paisley in the morning, then drive to Dumfries and play ice hockey at night, then the next day I'd have a basketball camp for Scotland and play again at night, " she explains.

BBC: GB's Olympic ice hockey dream

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

BBC: Escaped coati still missing from Belfast Zoo