英语词汇“primary xylem”是什么意思，“primary xylem”的读音、用法及例句翻译-烛光网

词汇	primary xylem
释义	primary xylemn.Botany（名词）【植物学】 A type of xylem tissue derived from the procambium.初生木质部：由原成层转变而成的木质组织种类
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