To prevent your teeth from decaying, you can do two things - strengthen your teeth's defenses with fluoride and sealants, and reduce the number of bacteria in your mouth.
为了预防龋坏的发生，你可以做两件事情——用氟化物和封闭剂增强牙齿保护，减少口腔内细菌。
Fluoride enhanced the percentage of human embryo hepatocytes apoptosis bodies and increased the number of cell in s phase.
氟可使人胎肝细胞凋亡百分率明显升高，S期细胞数增多。
Usually fluorinated copolymer unit, said the number of fluorine atoms, such as fluorine rubber, 23, is a vinylidene fluoride copolymers with chlorotrifluoroethylene.
通常以共聚物中含氟单元的氟原子数目来表示，如氟橡胶23，是偏二氟乙烯同三氟氯乙烯的共聚物。
Usually fluorinated copolymer unit, said the number of fluorine atoms, such as fluorine rubber, 23, is a vinylidene fluoride copolymers with chlorotrifluoroethylene.
通常以共聚物中含氟单元的氟原子数目来表示，如氟橡胶23，是偏二氟乙烯同三氟氯乙烯的共聚物。
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