Ask a pair of geochemists how something like this works, and they will start talking about isotopic abundances and ionization levels with an enthusiasm that is more endearing than fathomable.

要是你问两位地球化学家这工作是怎么进行的，他们会滔滔不绝地谈到丰富的同位素、离子化程度，等等，这些听上去很可爱，但不容易搞明白。