In animal information platform, the species category is a kind of tree-like relation, which needs to keep consistency in order to ensure the correctness of data in database.
在动物信息平台中，物种类别是一种树型关系，数据库必须维护这种树形关系的一致性。
In animal information platform, the species category is a kind of tree-like relation, which needs to keep consistency in order to ensure the correctness of data in database.
在动物信息平台中，物种类别是一种树型关系，数据库必须维护这种树形关系的一致性。
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