A recent study suggests that vitamin E supplements, despite widespread belief in their efficacy, are no better than sugar pills for delaying the onset of the degenerative disease.

最近的一项研究表明，尽管人们普遍相信维生素 E 补充剂的功效，但在延缓退行性疾病发病方面，维生素 E 补充剂并不比糖丸效果更好。

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The internet is crowded with testimonies of their efficacy and helpful intervention.

网上关于他们的效能和助益的证据随处可见。

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In addition, many new therapies are being introduced, as their efficacy is proven in clinical trials.

另外，许多在临床实验中展现出很好疗效的新方案，也在逐渐被采用。

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Central banks that have lowered rates to nearly zero are now using unconventional, quantitative tools, but their efficacy is unproven.

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"For the four others investigated, there are no published randomised clinical trials to support their efficacy in weight loss, " Dr Cable added.

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One key theme: Integrating Alza's drug delivery technologies with existing drugs could increase their efficacy and even allow them to treat new diseases.

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