Mercury levels are high in marine fish, too—particularly in larger species, such as shark, tuna, and swordfish.

海洋鱼类中的汞含量也很高——尤其在体型较大的鱼类体内，如鲨鱼、金枪鱼和旗鱼。

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In the US, mercury levels in the environment have been increasing at a rate of 1.5% each year since 1970.

在美国，环境中的汞含量不断增加，自1970年以来每年的增长率为1.5%。

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However, the company said in a statement that the latest tests on its staff had found nobody with elevated mercury levels.

然而欧司朗公司在一份声明中说对其员工的最新测试没有发现有人的汞含量超标。

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Scientists think it could reduce some of the risk of eating fish with still-climbing mercury levels.

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You can get comparison info on elementary schools in your city, smartphones and mercury levels in fish, to name a few.

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Meanwhile, data collected over eight years by Penn State University for the Pennsylvania Department of Environmental Protection show mercury levels 47 percent higher in areas closer to power plants.

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