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  3. Food Staple A food staple is a food that makes up the dominant part of a population’s diet. / Food staples are eaten regu

Food Staple A food staple is a food that makes up the dominant part of a population’s diet. / Food staples are eaten regu

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答案 Food Staple A food staple is a food that makes up the dominant part of a population’s diet. / Food staples are eaten regularly / and supply a major proportion of a person’s energy and nutritional needs. / Food staples vary in different places, / depending on the food sources available. / Most food staples are inexpensive, plant-based foods that are full of calories for energy. / There’re more than 50,000 edible plants in the world, / but just 15 of them provide 90 percent of food energy amount that the world’s population take in. / Although staple foods are nutritious, / they do not provide the full, healthy range of nutritious substances. /
解析                                                         主食
       主食是一种食物，它是人们日常饮食中的主要构成部分。主食是人们经常吃的食物，人体所需的能量和营养有很大一部分是由它们提供的。不同地方的主食有所不同，这取决于能找到的食物来源。主食多为便宜且富含热量的植物性食物。全世界有超过5万种可食植物，但其中只有15种为全世界的人口提供90%的食物能量。虽然主食有营养，但是它们并不能提供全面而丰富的营养物质。
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