Research on athletes and ordinary human subjects has yielded a mixed bag of results.

对运动员和普通人的研究得出了混合的结果。

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When it comes to scientific research, the results are mixed and at times contested.

一提到科学研究，研究结论往往五花八门且时常遭受争议。

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Equally crucial is lower-tech research into basics such as crop rotation and mixed farming of animals and plants on small farms.

同样重要的是，开展对基础知识的低端技术研究，如庄稼轮作，在小型农场中发展动植物混养。

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It does appear that it's harder to lose the weight below the waist, but there is some mixed research on that as well.

但腰部以下的脂肪似乎更难减掉,关于这点也有一些相应的研究

耶鲁公开课 - 关于食物的心理学、生物学和政治学课程节选

Experts say hormonal contraceptives are relatively safe, but there is some mixed scientific research on the topic.

CNN: Gaps found in young people's sex knowledge

Those questioned in the research had mixed views on whether the government should subsidise broadband.

BBC: Britons say broadband 'essential'

But these sorts of problems are endemic when scientific research is mixed up with a regulatory agenda.

FORBES: How Comparative Effectiveness Research Gets Corrupted by Politics