All the students have to give presentation by turns.

所有的学生要轮流作演讲。

By and by the days turned cold.

渐渐的，天变冷。

His obsession could make him by turns hustling, mean and dejected.

的痴迷会让时不时地变得急躁、刻薄和沮丧。

He kissed and embraced each of them by turns.

轮流亲吻和拥抱每个孩子。

I do this by turning off all notifications, so I'm not constantly being distracted.

我关掉所有的通知，这样我就不会经常分心。

In the past few years, schools have taken the lead by turning their campuses into bubbles of WiFi networks.

在过去的几年中，学校率先把校园变成线网络覆盖的世界。

These Kurdish militias are U.S. allies and they're afraid that by moving American troops out of the region, the U.S. is turning its back on the Kurds and opening the door for Turkey to attack them.

作为美军的友军，库尔德兵担心美军撤出该地区的行动，是置其安危而不顾，将打开土耳其攻的大门。

Not by turning our backs on free trade or the global rules based system which together have delivered the greatest advances in prosperity we have ever known.

不应该背弃自由贸易或基于全球规则的体系这些共同成就我所知最大的繁荣。

And the White House even got into the spirit by turning the fountain on the south lawn green.

白宫甚至还将南草坪的喷泉变成绿色来庆祝此项节日。

Drop it on top of the thermostat and after few short minutes, it'll be tricked into turning on again by lowering the ambient temperature.

把它放在温度调节器上面，短短几分钟之后，借由降低周围温度，它将会再次启动。

Suppose standing on the bridge next to the fat man, I didn't have to push him, suppose he was standing over a trap door that I could open by turning a steering wheel like that.

假设我站在桥上，胖子就在我旁边，我不用去推，假设踩在一扇活板门上方，而活板门可以通过转动方向盘来开启。

By turning clay into liquid, the process is dramatically shortened.

通过将粘土变成液体，这一过程大大缩短。

The amount of heat produced by this electrical apparatus is variable by turning a small handle.

这电热器所产生的热量可随着转动小把手而改变。

Bereavements and blessings, one following another, make us sad and blessed by turns.

痛苦与幸福交替出现, 使得我一会悲伤一会高兴。

It works by turning language into something computers can understand, math.

它的工作原理是将语言转化为计算机可以理解的东西，即数学。

We can use it more generally to talk about turning something good into something bad. And actually, we often use it by turning it into the adjective 'tainted'.

我还可以用它来泛指把好东西变成坏东西。其实我经常把它变成形容词“污染的”来使用。

Metabolism is the process by which living things turn food into energy.

新陈代谢是生命将食物转化成能量的过程。

By turns philosophical and polemical, this is a provocative and fascinating book.

时而富有哲理，时而充满争议，这是一本发人深省且引人入胜的书。

So, what should you do? Start by turning off the phone and unplugging any wires.

那么，你应该怎么做呢？先是关闭手机并拔掉所有电线。

They do it by turning their bodies into animated message boards.

它将自己的身体变成活动留言板。