【英语时差8,16】吃三文鱼有风险？

A study has found that salmon¹ raised in sea farms contain higher levels of pollutants² than wild salmon. But the levels are still well within legal limits. The study took two years. It found higher levels of P-C-B's, dioxin and other chemicals in farm-raised salmon. The levels were an average of ten times higher than in salmon caught in the open sea. The researchers say people can safely eat four to eight servings of wild salmon a month. The United States Food and Drug Administration, however, disagrees with this advice. Agency officials say they find no health concern. Their advice to people is not to change their eating of farmed or wild salmon. Federal and industry officials say the level of dangerous chemicals in salmon has decreased by ninety-percent since the nineteen-seventies. They say any threat is small compared to the good that eating salmon can do. Salmon is high in omega-three fatty acids. These can help prevent heart disease. Salmon is also among fish that are lower in levels of mercury pollution.

1 salmon   

n.鲑，大马哈鱼，橙红色的

参考例句：

• We saw a salmon jumping in the waterfall there.我们看见一条大马哈鱼在那边瀑布中跳跃。
• Do you have any fresh salmon in at the moment?现在有新鲜大马哈鱼卖吗？

2 pollutants   

污染物质（尤指工业废物）( pollutant的名词复数 )

参考例句：

• Pollutants are constantly being released into the atmosphere. 污染物质正在不断地被排放到大气中去。
• The 1987 Amendments limit 301(g) discharges to a few well-studied nonconventional pollutants. 1987年的修正案把第301条（g）的普通排放限制施加在一些认真研究过的几种非常规污染物上。 来自英汉非文学 - 环境法 - 环境法