但是在发达世界，现在我们无数的人们面临的是一个“过量”的奇特问题。

But in the developed world, hundreds of millions of us now face the bizarre problem of surfeit.

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解决这个问题的方法之一可能是第二种奇特的物理现象，热电效应。

One way out of this may be a second curious physical phenomenon, the thermoelectric effect.

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“人们做过很多奇特的设计，但很多方法存在的问题是实际载药量太低，”科汉说，“不明白以前为什么没有人这么做，好像我们发明了三明治”

“People had done all kinds of fancy things, but the problem with a lot of the methods was that the actual drug loading was very low, ” Kohane said. “It’s not clear why no one did this before.

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