Edward Giovannucci , a professor of nutrition and epidemiology at the Harvard School of Public Health, added: 'It is very rare a single study should be used to make a broad recommendation.'

在哈佛大学公共卫生学院的营养学和流行病学教授Edward Giovannucci补充道,很少有人会将一次研究结论广泛推荐给大众.

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Students here study a broad range of subjects, so sometimes they feel really tired.

这里的学生所学的科目范围很广，所以有时候他们觉得很累。

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Blackwell contributed to a broad study released in 2007 that predicted geothermal could provide one tenth of U.S. power by 2050.

布莱克威尔参与编写了一份内容广泛的研究报告。这份报告在2007年公布，预言到2050年，地热将提供十分之一的全美能源。

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Gordon is a 72 year-old economist who dedicated his career to the study of broad macroeconomic trends and Brynjolfsson is a 51 year-old economist who works alongside the technological wizards at MIT.

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As part of the compromise, ICANN also agreed to conduct a broad study of the initial election and the implications for selecting future at-large candidates.

CNN: Group overseeing Internet changes sets its election rules