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| 1. | Fighting against wrong ideas is like being vaccinated -- a man develops greater immunity from disease |
| 同错误思想作斗争，好比种牛痘，经过了牛痘疫苗的作用，人身上就增强免疫力。 |
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| 2. | the "prion" which seems to explain why humans may contract the fatal brain disease Creutzfeldt-Jakob Disease |
| 这个“普里安”似乎能解释为什么人们在食用了BSE污染的食物后会得致命的脑病，即克鲁滋弗特—亚柯布病(CJD)，也就是俗称的疯牛 |
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