这次考察航程最初的目的是测量持久性有机污染物之类的化学物质，而对金属的研究是一个后即想法。
The original objective of the voyage was to measure chemicals known as persistent organic pollutants, and the study of metals was an afterthought.
这次考察航程最初的目的是测量持久性有机污染物之类的化学物质，而对金属的研究是一个后即想法。
The original objective of the voyage was to measure chemicals known as persistent organic pollutants, and the study of metals was an afterthought.
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