环髓带 meaning in Chinese

perimedullary zone

Is different from the other 4 species of plants in test in that the cutin layer out of the stem is thick . huge crystals were found in cortex cavities . cortex comes to be aerenchyma
李与其它四种材料不同，茎的表面覆盖有厚的角质层；皮层内有大型菊花状簇晶，存在于胞间空腔内；皮层形成通气组织；环髓带明显。
There exist a lot of mucus cells in palisade parenchyma and vein - parallel mesophyll cells . the cells of cortex are loosely arranged , just like aerenchyma . there are many protein - bearing cells in pith
角蒿叶为等面叶，角质层薄，栅栏组织及平脉叶肉细胞中有大量粘液细胞；茎中皮层排列疏松，形成通气组织，髓中有大量的蛋白细胞，环髓带明显。