对于下层阶级的孩子，中心将提供模范的医疗和牙科保健。
For the lower-class children, the centers will often exemplary medical and dental care.
模范用户并不是聚类的中心，而是按照一定的生成规则生成的虚拟用户。
Model users is not the center of the users but virtual users generated according to certain rules.
对于下层阶级的孩子，中心将提供模范的医疗和牙科保健。
For the lower-class children, the centers will offer exemplary medical and dental care.
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