colunmar
·2,447,543篇论文数据，部分数据来源于NoteExpress
茎状中柱的髓显得颇强健，像厚角组织。
The pith of this stem like stele appears rather strongly like collenchyma tissue.
youdao
围绕中柱的是中柱鞘。
Surrounding the central cylinder is the pericycle .
Surrounding the central cylinder is the pericycle.
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