“皮层”造句

面霜中的胶原蛋白取自动物皮层。
The collagen that is included in face creams comes from animal skin.

皮层的内层分化为内皮层.
The inner layer of the cortex differentiates into the endodermis.

皮层细胞开始分裂.
Cortical cells begin to divide.