Oral Streptococcus mutans is an etiologic agent of dental caries and Streptococcus sangius is in favor of periodontal tissues.
口腔变形链球菌是龋病的主要致病菌，血链球菌为牙周有益菌。
Oral Streptococcus mutans is an etiologic agent of dental caries and Streptococcus sangius is in favor of periodontal tissues.
口腔变形链球菌是龋病的主要致病菌，血链球菌为牙周有益菌。
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