【新编英语教程】（第一册）Unit8 人类需求（1/3)

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When we speak of a basic human need we mean something which is necessary to life, something that we cannot possibly do without. Food is a basic human need. Without it we would starve to death; but even if we have plenty of food, but of the wrong kind, our bodies will suffer from a lack of the right food. This is known as malnutrition.
In primitive countries man's food needs are the same as in the more advanced societies like our own. We all need food and can manage to live a healthy life on limited types of food. Primitive people eat only the foods which can be grown near their homes, whereas we eat foods which are often grown many thousands of miles away from our homes. Primitive people are satisfied with less variety than we are, therefore we can say that although their needs are like our own their wants are different.