英语词汇primary xylem怎么读，是什么意思，单词翻译、读音、固定搭配用法和短语词组及例句-英汉双解词典

单词	primary xylem
释义	primary xylem 简明释义 [植] 初生木质部网络释义 1 [植]?初生木质部初生木质部(primary xylem)：初生木质部位于根的中央，由口径较小的环纹导管或螺纹导管组成，其紧接中柱鞘内侧的辐射角端较早分化幼稚，其主要功能是输导水... 2 ?原生木质部 ... primary water - （离子）近层水[在离子周围延 primary xylem - 原生木质部 primary meristem - 初生分生组织 ... 短语 1 primary y xylem 初生木质部双语例句 1 Primary xylem xylem derived from the procambium in the young plant. 初生木质部：指幼嫩植物中来源于原形成层的木质部。 2 Protoxylem the PRIMARY xylem elements that are formed from the procambium first. 初生木质部的成分，最早由原形成层形成。 3 At the upper and the middle part of hypocotyl, the pith appears, and the order of the primary xylem differentiation is endarch. 在下胚轴中、上部，髓部开始出现，初生木质部分化顺序为内始式；
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