一定变异性 definite variability 有限维管束；闭锁维管束 definite vascular bundle; closed vascular bundle 完全的；完全发育的；最后的；一定的 definitive ..
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3）Groud parenchyma 基本组织占主要部位 4）vascular bundles 有2种排列类型 Closed vascular bundles 有限维管束 Sclerenchyma with a supporting function 起支持作用白勺厚壁细胞 ..
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闭锁生物群；封闭族群 closed population 封闭维管束 closed vascular bundle; definite vascular bundle 密生群莒；密闭群落 closed vegetation; closed community ..
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closed collateral vascular bundle 闭锁并立型维管束
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