When a nitrogen atom sits next to a vacant spot in the carbon crystal, the intruding element provides an extra electron that moves into the hole.

当氮原子与碳晶体中的空心点相邻时，氮元素会产生特定的电子，这些电子可以移动到那个空心点里。

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African Anopheles mosquitoes find us by our carbon-dioxide-rich exhalation. But when they get close they turn away from our heads and dive for our feet-apparently their preferred snack spot.

非洲疟蚊通过我们富含二氧化碳的呼出物找到我们，它们不叮咬我们的头部，转而去叮咬我们的脚，显然那儿才是它们觅食的最佳场所。

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Now with this particular piece of instrumentation, you can actually spot individual carbon atoms.

现在利用这件特定的仪器，就可以真正观察到单个碳原子了。

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Light ones are more easily deflected than heavy ones, so the two forms of carbon get separated, and when each atom reaches a detector at its expected arrival spot, it can be counted.

ECONOMIST: Monitor