Earlier studies on black tea have shown that it can be effective against some forms of cancer and may even prevent heart and liver disease.

早先对红茶的研究已经表明，它可以有效地对预防某些类型的癌症，甚至可能预防心脏病和肝脏疾病。

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Background: Earlier studies on psychodynamics of women undergoing amniocentesis relied on quantitative data obtained from questionnaires at one point in time.

背景：早期针对羊水穿刺孕妇的心理动力学研究依据的是从过程某一点的调查问卷获取的量化数据。

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Quality and amount of sleep have a big effect on the grades of teenagers and college students, according to two studies reported in Time magazine earlier this year.

《时代》杂志今年早些时候公布的两项研究显示，睡觉质量和时间对青少年和大学生的学习成绩有着重要影响。

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Those measurements were observed in earlier studies on the same individuals.

VOA: special.2009.03.10

Well, the claim that language is part of human nature is supported by neurological studies, some of which were referred to in the chapters on the brain that you read earlier that talk about dedicated parts of the brain that work for language.

语言是人类本性的一部分的这个观点,得到了神经研究的支持,在之前大家阅读的关于大脑的章节中,对专门负责语言功能脑区的探讨,就描述了其中的一些研究

耶鲁公开课 - 心理学导论课程节选

Earlier studies by the 2 researchers described the effects of social networks on obesity and efforts to stop smoking.

VOA: special.2009.01.21

The relationship between impact speed and pedestrian risk of death has been studied previously, but earlier studies based on data from the United States are now several decades old, and more recent studies based on analysis of data from other countries have been limited to cars.

FORBES: In Crashes, Low Driving Speed Can Cause Serious Injury and Death to Pedestrians, Report Finds

Douglas Weaver, a cardiologist at Henry Ford Hospital in Detroit and president of the American College of Cardiology, saw earlier studies of Vytorin as a reason to back off on the drug.

FORBES: The Vytorin Saga

However, most studies have focused on exposures in adulthood rather than in earlier periods when susceptibility may be greater.

FORBES: After 40 Years Of Research, What Do We Know About Preventing Breast Cancer?