The length and rate of DNA migration in low dose group were markedly different from medium and high dose groups. There was no significant difference between medium and high dose groups.
微核率随着甲醛剂量的增加而升高，迁移率和迁移度在低剂量组与中、高剂量组之间有显著差异，中与高剂量组之间无显著差异。
The levels of bone Fe in anti-fluorine agent groups were all lower than those in control groups with significance in medium and low dose groups.
拮抗组中的骨铁含量均低于对照组，且中、低剂量组差异有统计学意义；
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