They expand when inhaling air, and contract when exhaling air.

它们在吸入空气时膨胀，在呼出空气时收缩。

I inhaled the freezing but fresh Beijing air.

我呼吸着北京寒冷清新的空气。

This is the final destination of the inhaled air.

这是入肺空气的最终目的地。

Why begin to inhale air only to suddenly stop it from actually entering the lungs?

为何刚开始吸入空气就突然阻止它真正进入肺部呢？

And most bizarrely, some researchers say inhaling all that cold air when we're sobbing might cool the brain, by literally cooling our blood.

最奇怪的是，一些研究人员表示，当我们哭泣时，吸入所有的冷空气可能会通过冷却我们的血液，来冷却大脑。

However, environmentalists and the EPA say that PVC production releases dioxins and pollutants, and you could be exposed to them by inhaling polluted air near manufacturing facilities.

然而，环保人士和美国环保署表示，PVC生产会释放二恶英和污染物，你可能会通过吸入生产设施附近的污染空气而接触到它们。

It begins with an involuntary spasm or sudden contraction of the diaphragm, the large dome-shaped muscle below our lungs that we use to inhale air.

它开始于一种无意识的痉挛或膈肌的收缩，膈肌是个大的、圆顶形的肌肉，位于肺的下方，用于吸入空气。

As for Passepartout, his face was as red as the sun's disc when it sets in the mist, and he laboriously inhaled the biting air.

至于路路通，他的整个脸膛又圆又红，活象傍晚沉浸在薄雾里的太阳。

But owing to his marked internal structure which gives him regular lungs, like a human being's, the whale can only live by inhaling the disengaged air in the open atmosphere.

但是，由于其独特的内部结构，鲸鱼像人类一样，拥有正常的肺，它只能靠吸进大气中与水脱离的空气而生活。

Every time you take a breath, you inhale the air around you, then exhale it back out mainly in the form of a gas called carbon dioxide.

每次呼吸的时候，你都会吸入周围的空气，然后把它给呼出来，主要是以一种叫做二氧化碳的气体的形式。

All her thoughts were now centered on her desire to inhale the smoke of a cigarette. So strong was this desire that she greedily inhaled the smoke-laden air which was wafted in from the corridor and through the cabinet door.

现在，她所有的思绪都集中在吸香烟的欲望上。这种欲望如此强烈，以至于她贪婪地吸入从走廊和柜门飘进来的烟雾弥漫的空气。