Single-layer skin

• 单皮层

Single-layer skin的用法和样例：

例句

1. Moisture is held in the center layer of the skin.
   水分保持在皮肤的中间皮层中。
2. Second, you have huge numbers of Mast Cells in the skin under the eyes.
   第二点，在眼睛下部的皮层内有极多的柱状细胞。