feather sac
英
美
- 毛囊
feather sac的用法和样例:
例句
- Proliferation of cells in a ring around the feather germ creates a cylindrical depression, the follicle, at its base.
环绕羽芽有一圈细胞不断增生,在基部形成圆柱状凹陷,称为毛囊。