1959年，美国癌症协会发起了一次大规模的研究，对一百多万美国人的锻炼、营养、吸烟、睡眠以及其它方面的习惯进行调查。
In 1959 the American Cancer Society started a massive study, surveying over one million Americans about their exercise, nutrition, smoking, sleep and other habits.
他们的调查结果已经提交给美国癌症研究协会。
Their findings were presented at the American Association for Cancer Research conference.
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