The cuticles of most vascular plants are covered with a thin layer of largely hydrophobic constituents.
大部分维管囊植物的角质层都被有薄薄一层很疏水的成分。
2
Procambium (procambium strand) The layer of cells that gives rise to the vascular tissue.
原形成层（原形成层束）：形成维管组织的一层细胞。
3
Results the manifold layer of vascular plexus around the throat and weasand was designed successfully, the structure exhibition was clear, and the appearance was delicate.