实际上，美国可以进口食物，也可以引进负责其采摘的工人。

In effect, the U.S. can import food or it can import the workers who pick it.

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大多数国家通常都进口食物产品和原料。

Imported food products and ingredients are common in most countries.

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上周五，中国和其它一些国家禁止从核污染区进口食物。

Last Friday, China joined a number of other countries that have banned imports of food from the affected areas.

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You can see in the New World with maize being important how America has become a corn dominated society, even though it's still true that we raise wheat, we raise other things in the United States, and we can import different foods, corn has become an incredibly important constituent of the diet in the U.S.

你能发现玉米在美洲大陆的重要性,那美洲是怎样变成主食玉米的社会的呢,尽管我们仍然种植小麦,在美国也种植其他粮食,而且我们能进口各种不同食物,但是玉米还是变成了,美国人食谱中不可代替的部分

耶鲁公开课 - 关于食物的心理学、生物学和政治学课程节选