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评价一个国家的食物结构是否合理,营养水平的高低,重要标志就是人均期望寿命的长短。那么,您一定想了解下文所述的常识。
Evaluation of a country’s food structure is reasonable, the level of nutrition, an important symbol is the average life expectancy of the length. Well, you must want to understand the common sense described below.