After a succession of warm days, the weather became cold.

连着暖和了几天后，天气变了。

By and by the days turned cold.

渐渐的，天变了。

Frogs, like many amphibians, also hibernate when it gets cold.

像许多两栖动物一样，当天气变时，青蛙也要冬眠。

But what causes the air to cool in the first place?

但首先，是什么原因导致空气变的呢？

It's possible it will get cold later and you'll need to put your coat on.

一可能变的，你需要穿上外套。

As heat leaves an object, it becomes cooler, a process known as radiative cooling.

热量离开物体时，物体变，这一过程称为辐射。

If the temperature is colder or warmer, seeds will still germinate – just more slowly.

如果温度变或变暖，种子仍然发芽，只是发芽速度变。

The weather turned cold in the mountains. The wind blew, and it began to snow.

山中的天气变了。刮起了风，又下起了雪。

Drink up your noodle juice before it gets cold.

在变之前快把你的茶喝了吧。

The final fate of the Solar System will be to cool off and freeze.

太阳系最后的状态将是变和冰冻。

One day was very like another, but Buck noticed that the weather was getting colder.

有一天一切如常, 但巴克留意到天气渐渐地在变。

It'll do two things, it'll bulk it out, and it'll cool it down a bit.

它产生两种作用，它让它变膨胀，它让它变。

Depending on how they form and where, they can either warm or cool the climate.

根据它们的形成方式和地点，它们可以使气候变暖或变。

Then at night when the air is cooler, the heat radiates away.

夜晚空气变时，热量幅散。

These autumn days will shorten and grow cold.

秋天的白昼要变短，天气要变。

The skin sends signals to the brain once the body starts to get cold.

一旦身体开始变，皮肤就向大脑发送信号。

First, you'll start feel a coolness in your hands, arms, legs and feet.

起初，你感觉手，臂，腿，脚开始变。

Professor Umbridge's eyebrows rose a little higher and her gaze became distinctly colder.

乌姆里奇教授的眉毛扬得更高了一些，目光明显变了。

Mercury to tell you when it's really cold.

汞能告诉你何时变。

Should it happen it could create a global cooling event like the ice age.

如果这种情况发生了，就可能造成像冰河时代一样全球变的状况。