Maybe it is sudden changes, or social situations.

也许是突如其来的变化，或者是社交场合。

There was a sudden change in the weather.

天气突然起了变化。

Sometimes depression manifests as anger, irritability, and sudden changes in mood.

有时抑郁表现为愤怒、易怒和情绪的突然变化。

This was a sudden and terrible change in my life.

这是我一生中一次突然的可怕的变故。

The sudden change in the operation plan made the patient unsettled.

手术计划的突然变更使病人心绪不宁。

A sudden change of direction would cause disastrous winds and massive waves.

突然改变自转方向将会引起灾难性的风暴和巨浪。

The sudden change " tells us exactly how sensitive these glaciers are, " said Schwikowski.

施维科斯基说，这种突然的变化" 确切地告诉我们这些冰川有多敏感" 。

That's fine. Listen, sudden change of plans. My maternity leave just ended.

没关系，听着，计划改变 我的产假要结束了。

In news, it often signals a sudden change in a story's direction.

在新闻中，它通常标志着故事的走向突然改变。

Bill stared at him, amazed at the sudden change in Paul's manner.

比尔盯着他，对保罗态度的突然变化感到惊讶。

“No—I—of course not, ” said Harry, disconcerted by this sudden change of subject.

“不—我—当然不介意，”哈利说，被这突然改变的话题弄得不知所措。

And finally, the phrase a shock to the system means a sudden and unpleasant change.

最后，短语“a shock to the system”是指突然且不愉快的变化。

I mean experiencing 'a sudden and unpleasant change from what you have been used to'.

我的意思是经历了突然的、不好的变化，与过去不一样。

'Don't go on! 'cried Tess. 'I can't believe in such a sudden change!

“别再说下去了! ” 苔丝叫了起来, “我不能相信这样一个突如其来的改变!

He would have been unable to answer a sudden change in tempo by the musicians.

如果音乐家的节奏突然变化，那么YuMi是无法做出响应的。

They were trapped in the fire due to a sudden change in the wind direction.

由于风向突然改变，他们被困在大火之中。

" We are very surprised to learn of this sudden change of direction, " she said.

" 我们对这一突如其来的变故感到震惊。"

" Phew—I shall not kill you, " he said contemptuously, as if under a sudden change of purpose.

“呸——我不杀你，”他轻蔑地说，仿佛一下子改变了主意。

Bazzoli says a sudden change in temperature and humidity can also irritate certain medical conditions like asthma.

巴佐利说，温度和湿度的突然变化也会引致某些疾病，比如哮喘。

They said this would help to reduce sudden or unexpected changes in the size of the human population.

他们说，这将有助于减少人口数量的突然或意外变化。