But if we burn coal in the 21st century using 20th century technologies, our air will be foul and disruptions to our climate will threaten us all.

但是，如果我们在21世纪用20世纪的技术烧煤，我们的空气将被污染，我们的气候会被破坏，这将使所有人受到威胁。

In the air was the smell of burning human flesh; human beings burn surprisingly quickly.

空气中弥漫着人体烧焦的味道，人的躯体的燃烧速度快得惊人。

Nitrogen is removed from the air, enabling the fuel to burn in pure oxygen.

氮气从空气中被去除，使得燃料能够在纯氧中燃烧。

If your engine's wheezing and has to work harder bringing in the air it needs to burn fuel efficiently, it doesn't complain to you.

如果你的爱车引擎有杂音而且在燃烧汽油时加入空气更加费劲时，它并不会向你抱怨什么。

The trouble was that at high altitudes where there is less oxygen, the propeller blades had little air to bite and engines still needed oxygen to burn petrol.

麻烦的是，高海拔的地段，氧气稀薄，螺旋桨叶片没有空气使其扇动，而且发动机燃烧汽油也需要氧气。