Plato's thoughts consist of three aspects: the theory of imitation, the theory of effectiveness and the theory of inspiration.

柏拉图的文艺思想包括如下三个方面：摹仿说，效用说和灵感说。

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Small-group theory can help us understand why there are such wide ranges of effectiveness among these groups.

小群体理论可以帮助我们理解为什么小组间的效率是如此不同。

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Prior to buying into a new program, it is important to research the effectiveness of a new theory.

在买进一种新的游泳教程以前，重要的是要研究新理论的实效性。

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Even in the absence of plausible theory (or just common sense), rigorous clinical testing could provide evidence of homeopathy's effectiveness, but the data suggest otherwise.

FORBES: Homeopathic Medicine Is Homeo-Pathetic

Moreover, many governments that provide medical care for their citizens (including America, if Barack Obama's health proposals become law) are beginning to demand that drugs firms prove the effectiveness of expensive new pills in practice as well as in theory.

ECONOMIST: Pills get smart