1.Living at the top of the food chain, sharks can accumulate dangerous levels of methylmercury.

因为生活在食物链的顶端，所鲨鱼累达到危险水平的汞。

2.Mercury Mercury occurs naturally in air, water and soil, but it gets very dangerous when it builds up in fish and becomes methylmercury.

汞 汞天然存在于空气、水和土壤中，但当它在鱼体内累并变成基汞时会变得非常危险。机翻

3.For instance, the Minamata disease outbreak in Japan, caused by the release of methylmercury into Minamata Bay by a chemical factory, resulted in severe neurological damage and death for thousands of people.

例如，日本的水俣病疫情是由一家化工厂向水俣湾排放基汞引起的，导致严重神经损伤和死亡。

4.Our simulations show that the projected methylmercury concentrations in forage fish and Chinook salmon will surpass Canada's mercury consumption limits this century, as well as the consumption advisory level issued by the World Health Organization.

我们的模拟显示，本世纪内，饲料鱼和奇努克鲑鱼中的预计基汞浓度就将超过加拿大的汞摄入限额，及世界卫生组织发布的摄入指引水平。