Common Cause, the largest citizens group in the us, did a study which showed that a letter to the editor was one of the most effective ways of influencing politicians.

共同事业，这个全美最大的公民组织，做了一项调查，其结果显示：给编辑写信是最有效的影响政客的方式之一。

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So I was excited when this study, revealed at the World Congress of Dermatology, showed that pentapeptides are effective in reducing the appearance of lines and wrinkles.

所以当我发现在世界皮肤病学会议上发表的研究显示五肽可以有效减少细纹和褶皱的出现的时候，我感到非常兴奋。

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Published in the Feb. 9, 2006, New England Journal of Medicine, the yearlong study found that the plant extract was no more effective than inactive pills (placebos) in easing symptoms of BPH.

新英格兰医学周刊在2006年2月9日出版的一篇长达一年的研究报告显示，这种草药并不比诸如安慰剂等药片在治疗BPH上更有效果。

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The study found the most effective treatment was high doses of high-flow oxygen.

VOA: standard.2009.12.17

But the bank has emerged from the crisis as one of the most effective at promoting stability, according to a study by the Federal Reserve Bank of New York.

ECONOMIST: The Swiss National Bank

The National Institutes of Health responded by funding a study showing the drugs are equally effective ( see here).

FORBES: The Eyes Have It: Can Regeneron Make Roche Blink?

Dr Schulte explained the team decided to carry out the study in order to identify effective indicator species that offered an insight into the health of the region's environment.

BBC: Elephant ecological engineering 'benefits amphibians'