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primary phloem
释义
primary phloem
Encyclopedia
理学
〔植物形态与结构〕
释
primary phloem
初生韧皮部
由根端或茎端顶端分生组织分化出的原形成层进一步分化形成的韧皮部。
Biology
primary phloem
初生韧皮部
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