The answer lies in a slightly obscure but ingenious field known as isotope geochemistry.

答案在于同素地球，这是个不大知名而又十分奇妙领域。

His definition of " geochemistry" stretches, however, well beyond many people's, into political and economic history.

然而，他对“地球”定义远远超出很多人定义，延伸到政治和经济史上。

I need to talk to somebody who knows more about geochemistry than I do I think for that one.

我需要比我想象更解地球人交谈。

So the Clark Fork geochemistry explains why acid rain isn't as devastating here as it is in, say, the Adirondack Mountains of New York where there is no limestone.

因此，克拉克福克地球解释为什么酸雨在这里不像在没有石灰岩纽约阿迪朗达克山脉那样具有破坏性。

Geology is the study of the Earth's physical structure and substance, while geochemistry is a branch of chemistry that focuses on the chemical composition of reactions in rocks and minerals in the Earth's crust.

地质是对地球物理结构和物质研究，而地球是个分支，侧重于地壳中岩石和矿物反应成分。