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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  This is a little bit blurry,
  这会有些模糊
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  but what it says is that the areas that are the cross-hatched bars
  用交叉平行线画出的部分
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  are regions where wheat can grow
  是小麦生长的地区
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  and the yellow bars are where wheat can grow now.
  黄色的部分是现在小麦能生长的地区
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  You can see large areas of the United States
  你们可以看到
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  are viable for growing wheat at the present time
  美国的大片土地 甚至延伸至加拿大
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  and that area expands up into Canada.
  现在都适宜种植小麦
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  By the year 2050, with a projected climate change,
  随着预计中的气候变化 到2050年
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  the blue bars are where wheat will grow.
  小麦种植就限于蓝色的部分
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  You can see that there's almost none left in the United States.
  你们可以看到美国几乎不再适宜种植小麦
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  These are really very profound changes.
  这的确是沧桑巨变
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  Now what does this mean? Does this mean
  这意味着什么