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23集 第23集》

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  One is to think about power,
  一个是效力
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  and the other is to think about top-down versus bottom-up change,
  另一个就是自上而下和自下而上的转变
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  and then they connect with each other.
  然后将它们联系起来
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  So if you think about the power
  如果考虑的是
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  to make change in the food environment,
  改变食物环境的能力
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  you can create a grid that looks like this,
  你就可以作出这样一个表格
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  where you can cross power with impact,
  将效力和影响联系起来
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  and look at things that are high and low in power
  观察那些事情效力的大小
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  or positive or negative in impact.
  或者是影响的积极或消极
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  And then you can take various things that have been done
  之后你就能将很多做过的事情
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  and place them somewhere in this grid,
  放入这些格子里
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  so basically everything we've talked about in the class,
  基本上我们在这堂课上讲到的所有事情