本文详细论述了库仑法快速测定低污染的校区生活污水和高污染的工业污水中的化学耗氧量。

This paper discusses in detail that coulometry quickly measures chemical oxygen demand of low polluted domestic sewage of the school and high polluted industrial sewage.

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世界卫生组织说，导致高污染水平的原因各有不同，不过通常是由迅速工业化及在交通和发电上使用低质量的燃料导致的。

WHO said the reasons for the high pollution levels varied, but that often rapid industrialization and the use of poor quality fuels for transportation and electricity generation are to blame.

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他们的高污染工业在1990年代陷于崩溃，手中有大量的碳信用额度，可以非常廉价地购买。

Their dirty industries collapsed during the 1990s, so they are awash with carbon credits that can be bought for a small consideration.

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