An abstract noun is transformed into an ordinary noun, which means that a person or a person with a certain nature or a representation of a situation or concept.

抽象名词转化为普通名词，表示具有某种性质的人或表示某种情况或概念。

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Compared with ordinary quadtree, it has some advantages including a high rate of compression and a direct representation.

与常规四叉树结构比较，该方法具有压缩率高、表达直接等优点。

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