他告诉孩子们每一种昆虫对污染的敏感性，并要求他们据此推算出池塘的污染程度。
They are told how sensitive each species is to pollution, and asked to work out from this how polluted the pond is.
由于不同细菌对不同污染的敏感程度不同，因此，不同颜色的荧光可以用来显示特定的化学物质。
And because different bacterial species are sensitive to different pollutants, different coloured glows can indicate the presence of specific chemicals.
从某些排队去洗手间的人群中可探到一些好的迹象，头发油亮、珠光宝气的游客说话谨慎，似乎惧怕日本的核泄漏恶魔，尽管日本地处遥远，却拯救不了对核污染特别敏感的德国，并常心惊胆颤。
Some spying in the queue to the restrooms offered as good an indication as any. The coiffed, bejewelled visitors could speak of little other than Japan and their fears of a nuclear meltdown.
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