FDA stopped monitoring mercury levels in domestically-caught fish in 1998. Yet in one sampling, three of the four fish tested in 1997 had levels exceeding FDA's human health standard for mercury.
美国食物药品管理局在1998年已停止监管在本地捕捉鱼类的水银含量。但是在1997年一个抽样调查中，每四尾鱼中有三尾超过食物药品管理局的水银含量健康标准。
It is the first national fish tissue survey to be based on a probabilistic (random) sampling design, and it will generate data on the largest set of PBT chemicals ever studied in fish.
该计划在美国第一次采用随机抽样的方法进行鱼体组织调查，并得到了有史以来最详尽的鱼体毒物残留数据。
It is the first national fish tissue survey to be based on a probabilistic (random) sampling design, and it will generate data on the largest set of PBT chemicals ever studied in fish.
该计划在美国第一次采用随机抽样的方法进行鱼体组织调查，并得到了有史以来最详尽的鱼体毒物残留数据。
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