1、
The pith of this stemlike stele appears rather strongly like collenchyma tissue.
茎状中柱的髓显得颇强健,像厚角组织.
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2、
Collenchyma cells have thick walls that are especially developed at the corners of the cell.
厚角组织细胞尤其在细胞的各个角上具有厚壁.
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