他是达尔文进化论的主要阐述者。

He was a leading exponent of Darwin's theory of evolution.

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自他是财政大臣以来，布朗一直是一个新的全球金融构架的思路清晰的阐述者。

Ever since he was chancellor, Mr Brown has been an articulate expositor of ideas for a new global financial architecture.

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我国学者对此也有研究，但鲜有深入阐述者。建立情节冲突适用规则的层次化体系，可从一般原则和具体适用规则两个方面的操作。

In our country, hierarchy system of plot applicable to conflict can be established, and handle it from general principles and specific application rules.

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