在爱荷华州，黛安·奥特·惠利希望保护具有历史意义的植物品种，比如她的曾祖父100多年前从德国带到美国的种子。

In the state of Iowa, Diane Ott Whealy wanted to protect historic plant varieties, like the seeds her great-grandfather brought to the U.S. from Germany more than a hundred years ago.

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现在，回溯到近代历史上在爱尔兰发生的马铃薯饥荒，由仅仅几个品种引起的植物枯萎病危及了所有农作物，并导致数以百万计的人死于饥饿。

Now, dig back to recent history\\\'s potato famine in Ireland, where a blight knocked out the whole crop, which consisted of just a few varieties, and millions of people died of starvation.

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在整个人类历史上，作物和畜牧品种的跨文化流动使饮食有了巨大改变，减少了贫困。

Throughout history, the intercultural movement of crops and livestock breeds revolutionized diets and reduced poverty.

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