The Chinese fern families and genera: systematic arrangement and historical origin I.

文章题目中国蕨类植物科属的系统排列和历史来源.

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There are variety of versions in academic circles concerning the historical origin of the Tus.

关于土族的历史来源,学术界有各种说法.

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Formation of the problem has its profound historical origin . Its essence is a legal matter.

“三农”问题的形成有其深刻的历史渊源,与法律问题密切相关.

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The generation and development of administrative compensation have their thought roots and historical origin.

行政补偿的产生和发展有其思想根源和历史渊源.

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