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  • QJ6835962334
  • Doc stock
  • 不需要肖像权授权
  • 5400 x 4827 px
  • 上皮细胞,细胞,嘴,膜,400倍,联系,纸巾,外部,表面,遮盖,中空,器官,防护,正面
  • epithelium cells of the mouth mucous membrane lumen fluorescence 400x - epithel epitelgewebe - association epithelial tissue of cells,the external or inner surfaces of the body or covered by hollow organs, functions, protection in front of foreign bodies

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