来自《耶鲁大学开放课程：心理学导论 第20集 第20集》

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  by getting them to stick their hand in freezing cold water
  让他们把手持续放在冰水里
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  and with people undergoing
  还有一组人去做
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  extremely painful colonoscopy procedures.
  极其痛苦的结肠镜检查
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  And it turns out that if you want to give people a good memory,
  事实证明 如果你想让人们对糟糕的事
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  or a less bad memory, of a horrible event
  留下好印象 或不那么坏的印象
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  topping them off with some mild pain will do the trick.
  那就在结束时让他们好过点
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  In the end, endings matter.
  总之结果很重要
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  Both of these examples,
  下面两个例子
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  a party that's hugely fun for ninety percent,
  一个接近完美的派对
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  then the last ten percent somebody slaps you in the face
  美中不足的是有人扇了你一耳光
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  and pours dip on you or something--
  并向你泼东西
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  So, ninety percent of good stuff, ten percent bad stuff,
  那么90%的好事 10%的坏事