The youth yearns day and night. For the good maiden fair.

窈窕淑女，寤寐求之。

For example, your circadian rhythm naturally corresponds to the Earth's day and night cycle.

比如，我们的昼夜节律天生和地球的昼夜周期相一致。

Day and night, male guards, they watched her, taunting her, threatening her with assault.

男性警卫日夜监视她，嘲弄她，威胁要殴打她。

Specifically, a type called synthetic aperture radar, which works day and night, and through clouds.

具体来说，就是一种合成孔径雷达，它可以夜以继日地，还可以穿越云层。

That's good news. We've been living in a less than glamorous part of Aberdeen, constantly harassed day and night by noisy neighbors.

这是个好消息。我们一直住在阿伯丁的一个那么迷人的地方，经常被嘈杂的邻居们日夜骚扰。

It means equality between day and night when they're almost the same length.

这意味着白天和黑夜的时间同样长。

As much as your families, you friends, faculty members, and I wish it weren't the case – and no matter how well Duke has prepared you for what comes next – you will undoubtedly encounter some darker days and nights.

我和你们的家人、朋友和教职一样，都希望事如此，但无论杜克大为你们的未来做了多么充分的准备，你们都肯定遇到一些更黑暗的白天和夜晚。

Oil once made them the richest in South America but this is now the line for three days and nights to get a full tank.

石油曾经使他们成为南美最富有的国家，但是现在他们需要三天三夜才能加满油。

I thought about it day and night.

我日夜思考着逃跑的事。

When this happens, day and night are the same length and an equinox is occurring.

当太阳穿过地球赤道时，白天和黑夜时长等长，也就是昼夜平分时了。

We work day and night, even now. We work day and night.

我们夜以继日地，即使现在也是如此。我们夜以继日地。

But people in the United States and abroad want to know what to expect politically come 2021, and you can get the latest results updated day and night at CNN.com.

但是论是美国还是国外的人们都想以此了解2021年的政治前景，这时就可以在美国有线电视新闻网上查看选举的实时更新况.

Part of a long tradition of Christian hermits, Sara spent forty days and nights alone on the Isle of Skye, seeking God in the silence of the remote Scottish island.

为基督教隐士长久以来的传统的一部分，莎拉一个人在 Skye 岛上待了四十天，在遥远的苏格兰岛的寂静之中寻找上帝。

I trained tirelessly day and night drilling my body in every aspect of the craft.

我日夜孜孜倦地训练，在该技艺的各个方面钻研我的身体。

And this means all day and night, or more idiomatically, just nonstop.

这意味着全天候，或者更成语化地说，就是停歇。

We spent two days and nights on the train.

我们在列车上度过了两天两夜的时光。

Day and night, the horse was at the cowboy's side.

日日夜夜，马都在牛仔身边。

We worked day and night, through the holidays, to fix that plant.

我们夜以继日地，节假日也休息，将厂修建完成。

The days and nights passed slowly for Edmond.

在爱德蒙看来，监狱里的日子尤其漫长。

Days and nights pass and ages bloom and fade like flowers.

夜去明来，时代像花开花落。