ประโยคภาษาจีน : 中文句子 |
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fāng fǎ 方法 zài 在 hán yǒu 含有 bù tóng 不同 fú huà nà 氟化钠 nóng dù 浓度 de 的 shàng 上 zhú bù 逐步 yòu dǎo 诱导 biàn xíng 变形 liàn qiú jūn 链球菌 chǎn shēng 产生 nài 耐 fú 氟 jūn zhū 菌株 bìng 并 yǔ 与 qīn dài 亲代 jūn zhū 菌株 jìn xíng 进行 bǐ jiào 比较 |
Methods fluoride-resistant strain of streptococcus mutans was obtained by subculturing streptococcus mutans to BHI containing different concentrations of NaF, and they were compared. |