从2000年3月至2001年3月，海托华筛选了720人，然后检验那些每周吃鱼超过三两的人的汞含量。
Hightower screened 720 people from March 2000 to March 2001, then tested the mercury levels of those who reported eating more than two servings of fish a week.
从2000年3月至2001年3月，海托华筛选了720人，然后检验那些每周吃鱼超过三两的人的汞含量。
Hightower screened 720 people from March 2000 to March 2001, then tested the mercury levels of those who reported eating more than two servings of fish a week.
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