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联合国世界卫生组织(WHO)经过对全球人体素质和平均寿命的测定,对人类年龄的划分标准作出了新的规定。该规定将人的一生分为5个年龄段,即:44岁以下为青年人;
The United Nations World Health Organization (WHO) has set new standards for the classification of human ages through the measurement of global human quality and life expectancy. This rule divides a person’s life into five age groups, ie young people under the age of 44;