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

答案在于同位素地球化学，这是个不大知名又十分奇妙领域。

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

，他对“地球化学”定义远远超出很多定义，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.

我需要与一位比我想象解地球化学交谈。

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，克拉克福克地球化学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.

地质学是对地球物理结构和物质研究，地球化学是化学一个分支，侧重于地壳中岩石和矿物反应化学成分。