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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  --each of these ingredients will have an energy cost,
  每一种配料都会有能源消耗
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  but since corn is the predominant we can talk about that.
  但既然我们主要谈论的是玉米
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  We can think about the oil that's necessary
  我们可以研究一下
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  to create this transaction of
  在购买一袋像多力多滋
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  just buying something simple like a bag of Doritos.
  这样的食品的交易中所消耗的石油
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  Well, there's oil involved in the genetic modification of
  在玉米的转基因过程中以及
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  the corn and bringing those seeds to the farmer.
  种子送到农民手里均需要能耗
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  There's the seed transport from the place
  种子从转基因种子育种地
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  that genetically modified seeds are made to the distributor,
  被送到批发商那里
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  the seeds then have to go to the farm;
  然后被运到农场里
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  there's shipping involved in all this.
  在这过程中都涉及到运输问题
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  Then there's of course the planting of the seeds,
  然后当然还有播种过程