The population of the people overage 80 will be 426 million in 2050, three times larger than that now.
到2050年,80岁以上的人口将达到4.26亿,是现在的三倍。
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Researchers from the University of Leipzig in Germany gathered more than 1,000 retired workers who were overage 75 and assessed the volunteers' memory and thinking skills through a battery of tests.