干细胞机理，干细胞可以代替和修复死亡和受损伤的细胞，干细胞具有趋化性#干细胞#卡替干细胞#牙髓干细胞
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干细胞机理，干细胞可以代替和修复死亡和受损伤的细胞，干细胞具有趋化性#干细胞#卡替干细胞#牙髓干细胞
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