At last he spied her, but there was a sudden falling of his mercury.
他终于发现了她，但他的情绪突然低落下来。
Airborne mercury can change into a highly toxic form after falling into waterways.
如果空气当中的汞进入到水系中，会产生剧毒。
According to the falling rate, the content of mercury in the deposit will reach the background value after 32.57 years.
按此下降速率，沉积物的汞含量经32.57年可达到背景值水平。
According to the falling rate, the content of mercury in the deposit will reach the background value after 32.57 years.
按此下降速率，沉积物的汞含量经32.57年可达到背景值水平。
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