American officials banned British cattle feed in 1988, as soon as scientists implicated it in BSE, and later barred the recycling of domestic cows as well.

 
  • 美国官方1988年就已禁止英国牛饲料的进入,而且一旦科学家怀疑有BSE的危险就立刻禁止回收家养牛。
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