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.
这样的警告来自于一份全新的国际科学报告，它详细研究了气候变化与名为“持久性有机污染”的一系列人为有毒物质之间的关系。
The warning comes in new international study into the links between climate change and a class of man-made toxins called persistent organic pollutants.
西澳大利亚大学的肯尼斯·克莱门茨(Kenneth Clements)、Yihui Lan和Shi Pei Seah对巨无霸指数的最新研究表明，失调具有明显的持久性。
A recent study of the Big Mac index by Kenneth Clements, Yihui Lan and Shi Pei Seah of the University of Western Australia showed that misalignments are remarkably persistent.
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