来自《耶鲁大学开放课程：有关食物的心理学、生物学和政治学 第12集》

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  Then that, in turn, affects the individual
  然后环境作用于个体
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  and then you get the increased health and well being.
  于是个体获得健康改善和幸福生活
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  Here's an example drawn from economics.
  这是一个经济学的例子
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  There's a group of economists
  有一组经济学家
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  who have studied enrollment in pension plans.
  他们研究了退休金注册情况
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  Some employers automatically enroll people in pension plans,
  一些雇主自动将员工注册入退休金计划
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  which are a good idea by the way,
  这是个好主意
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  because then if you're investing money throughout your work life,
  因为如果你在工作期间持续投资
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  you're less likely to be dependent on the state later in life.
  生命的后半程对国家的依赖就会较少
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  Some employers make you--enroll you by default--others--
  一些雇主自动你注册
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  but you're allowed to opt out of it.
  但你可以决定退出
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  Others don't enroll you but you're allowed to opt in,
  另一些不为你注册 但你可以选择参加