xylem的翻译，读音

例句

The xylem of ferns only contains tracheids. 蕨类植物的木质部只含有管胞。

The xylem of ferns and conifers contains only tracheids. 的木质部仅含有管胞。

Large proportion of xylem benefit to the water transfer. 叶脉中木质部比重越大,越有利于水分的传输. 。

Secondary xylem consists of pitted vessels parenchyma fibers and rays. 次生木质部由孔纹导管、薄壁组织及射线所组成。

Secondary xylem consists of pitted vessels, parenchyma fibers and rays. 次生木质部由孔纹导管、薄壁组织及射线所组成。