来自《哈佛大学公共课-公正：该如何做是好 第6集》

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  Then he takes another case, the case of suicide.
  然后他又举了另一个例子 自杀的例子
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  He says we have a duty to preserve ourselves.
  他认为我们有保护自己的职责
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  Now, for most people who love life,
  对于大多数热爱生活的人来说
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  we have multiple reasons for not taking our own lives.
  我们有很多不去自杀的理由
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  So, the only way we can really tell,
  那么 我们可以辨认出
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  the only way we can isolate the operative motive
  并找到那些不会自杀的人
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  for someone who doesn't take his or her life
  其关键动机的唯一方法
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  is to think, to imagine someone who's miserable
  就是去想象某个不幸的人
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  and who despite having an absolutely miserable life
  想象那个尽管人生非常不幸
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  nonetheless recognizes the duty to preserve one's self
  却认识到了人有保护自己的职责
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  and so does not commit suicide.
  所以才不会去自杀的人
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  The force of the example is to bring out the motive that matters
  这个例子的作用就是为了引出重要的动机