Rice is always the main food for the Chinese.

米饭一直是中国人的主要粮食。

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People in some countries eat many potatoes as their main food.

在一些国家，人们以土豆为主食。

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The nutrients in the rural areas get gobbled up, and the cities become the main food hubs.

在农村地区的营养成分得到的非常充分，并且成为城市中心的主要食品。

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The Agriculture Department says poverty is the main cause of food insecurity and hunger in the United States.

VOA: special.2009.11.23

Here you see the main concern is what's happening with blood sugar when people eat food.

它主要关注的问题是进食引起的血糖变化

耶鲁公开课 - 关于食物的心理学、生物学和政治学课程节选

So that would suggest that education is probably not going to get the job done, because that's not the main driving reason because most people know that they shouldn't eat so much junk food, but education is what we default to when we think about what to do.

所以你们可能认为,教育并不能解决这个问题,因为这不是主要原因,大部分人都知道不该吃那么多垃圾食品,教育是思考解决方法时被忽略了的

耶鲁公开课 - 关于食物的心理学、生物学和政治学课程节选

Spiders will eat stink bugs, but there is no American predator that relies on them as their main food source, Ms. Leskey says.

WSJ: Out of Odor: Offensive-Smelling Bugs Put U.S. Farmers on the Defensive

It's its main food source, the prairie dog, that's the problem.

NPR: Drilling to Begin in Colorado Ferret Habitat

Sainsbury's is proposing a 30, 000 sq ft store which it claims would bring about 200 jobs to the town and address limits in its "main food provision".

BBC: Town store fight enters new phase