secondary structure of stem 茎的次生结构
Primary structure of stem 茎的初生结构
structure of spherical stem-bulkhead 球面艏端隔壁结构
There is a layer of compressed cells in the secondary structure of stem.
在茎的次生结构中皮层与韧皮部之间有一层扁平形细胞；
The primary structure of stem consists of epidermis, cortex and vascular cylinder too.
茎的解剖结构也由表皮、皮层和维管柱组成。
In the eyes of the anatomical structure of stem, it would be a chief measure to suppress the differentiation of vessel lumen and pith cavity for harnessing the overrun of the species.
从茎的结构上看，治理该种应以限制其导管腔和髓腔分化为主要手段。
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