Trees have been studied extensively as abstract mathematical entities, so there's a large amount of theoretical knowledge about them.

人们把树作为抽象的数学实体来广泛的研究，因此有大量的关于树的理论知识。

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Trees have been studied extensively as abstract mathematical entities, so there's a large amount of theoretical knowledge about them.

人们把树作为抽象的数学实体来广泛的研究，因此有大量的关于树的理论知识。

youdao