So, " breathe in through your mouth" , " breathe in" .

所以，“用嘴吸气”，breathe in。

Every time you breathe in, you're breathing in the natural world.

你的每一次呼吸，都是在自然世界中呼吸。

Breathe in, one, then out. Breathe in, two, then out, and so on.

吸气，一，然后呼气。吸气，二，呼气，依此类推。

As we breathe in, the diaphragm tightens.

当我们吸气时，横膈膜会收紧。

What's harder, breathing in or breathing out?

是吸气困难不是呼气困难？

What life breathes in the animals that quench their thirst at that spring!

在泉旁饮水的动物多惬意啊！

So you'll notice here " breathe in" .

注意这里的 breathe in。

Just have people breathe in more CO2.

只需要让人们吸更多的二氧化碳。

First, slowly breathe in through your nose.

首先，慢慢地用鼻子吸气。

Breathe in slow. And out the same.

慢慢吸气。慢慢呼出来。

And that spared people from breathing them in.

避免民众吸入这些污染物。

So breathe in and breathe out.

吸气和呼气。

Remember to breathe in part two.

在第二部分记呼吸。

Don't breathe in for the next few minutes.

接下来的几分钟不要吸气。

How much longer? I can't breathe in here.

还要多久啊？我都不能呼吸了。

We breathe in this handful substance.

我们会吸入这一小撮物质。

Deep breathe in as you stretch.

伸展时深呼吸。

I'm stunned he can breathe in those pants.

他穿着这种裤子还能呼吸，我也很震惊。

I breathed slowly in and out through my mouth.

我开始用嘴呼吸，艰难地吸气，呼气。

In fact, the word 'inspire' literally means 'to breathe in'.

事实上，“鼓舞”的字面意思就是“吸气”。