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Global health 全球健康 One potato, two potato, three potato 一个懒汉，两个懒汉，三个懒汉 An effort to count the world s sloths 来数一数世界上的懒汉 A PAPER in the Lancet, shamelessly timed tocoincide with the Olympic games, comparescountries rates of physical activity. 《柳叶刀》的一篇文章对世界各国人民进行体育锻炼的比率做了一个比较，而这篇文章的发表时间竟有意选在了奥运会召开之际。 The study it describes, led by Pedro Hallal of the Federal University of Pelotas, in Brazil, is themost complete portrait yet of the world s busy bees and couch potatoes. 文章中的研究由巴西佩洛塔斯联邦大学的Pedro Hallal主导，是迄今为止对世界上的勤劳之人和电视懒虫最为完整的描绘。 It suggests that nearly a third of adults, 31%, are not getting enough exercise. 研究显示，世界上有将近三分之一31%的成年人缺乏锻炼。 That rates of exercise have declinedis hardly a new discovery. 人们的锻炼比率有所下降这并不是什么新发现。 Since the beginning of the industrial revolution, 自从工业革命开始后， | 
