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10集》

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  the 1,242 is a kilogram of rice;
  生产1公斤大米需要1242加仑的水
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  and the 1,651 is a kilogram of beef.
  而生产1公斤牛肉需要1651加仑水
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  Now, think about the production of corn
  首先让我们看看玉米的生产
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  and what humans choose to eat.
  和人们对食物的选择
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  Now you have choice, as a human, to eat the corn,
  作为人 你可以选择 吃玉米
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  or you can have the corn fed to the cow and then eat the cow.
  或拿玉米喂牛 再把牛吃掉
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  So those are all choices we make.
  我们可以做选择
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  The energy cost of that choice, whether you eat the raw product
  你是选择吃初级产品
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  or you eat the product of the raw product,
  还是吃由初级作物而来的食物
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  namely the beef from the cow, has big differences in cost.
  也就是牛肉 其能量成本的差别非常大
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  There are two costs here.
  这里包含了两重成本
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  There's depletion of water resources and
  水资源的消耗