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来源:雅诚德英语网
Sealants are protective coatings placed over the tops of chewing teeth - molars and premolars.
封闭剂在是牙齿咀嚼面上覆盖一层保护材料——在磨牙或者前磨牙。
Sealants are protective coatings placed over the tops of chewing teeth - molars and premolars.
封闭剂在是牙齿咀嚼面上覆盖一层保护材料——在磨牙或者前磨牙。