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.
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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