人口、占世界五分之一 Population is the world's one-fifth ; The more one-fifth of the world population
中美两国经济总量占世界的三分之一，人口之和占世界的四分之一，贸易总额占世界的五分之一。
Together, China and the United States account for about one third of the world economy, one quarter of the world population and one fifth of the international trade.
中国妇女占世界妇女人口的五分之一。
Chinese women make up one fifth of the world's total female population.
中国人口占全世界的近五分之一。从1980年开始实施的独生子女政策避免了大约4亿人口的降生。
China has almost a fifth of the world's population. The one-child policy, in place since 1980, has averted an estimated 400 million births.
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