When rain falls, the loess particles on the surface layer swell and form a crust that is almost impermeable to water . 降雨时，表层的黄土粒就发生膨胀并形成一层几乎是不透水的表皮。
Nonspecific cellular defense mechanisms in the lung rest principally on epithelial cell elements and several types of phagocytic cell . 肺中非特异性细胞防御机理主要在于表皮细胞和几种有吞噬作用的细胞。
The cuticle exists as the separable outer boundary and consists of a layer of wax and pectin materials that appears to be structureless . 可以区分开来的外部周界是表皮层，由无定形组织的蜡质和果胶构成。
There are, in addition to the waxy substances of the cuticle, other noncellulosics in the form of ash, pectic, and proteinaceous materials . 在表皮上有些蜡质，以及其它一些非纤维素物质包括灰分、果胶和蛋白质。
Epithelial cell defenses include the ciliated epithelial cells, goblet cells, and other secretary epithelial cells of the tracheobronchial tree . 表皮细胞的防御包括起纤毛作用的表皮细胞、环状细胞和气管支气管树的其他起分泌作用的表皮细胞。
We may say that the epidermis proteets the dermis 我们可以说是表皮保护了真皮。
The epidermis arises from the tunica meristem 表皮来源于分生组织近外方的细胞。
Sawn timber - method for assessment of case - hardening 锯材.表皮硬化的评估方法
Dilation of the veins right below the skin of the leg 腿部表皮以下的血管明显胀大。
