Xylem的例句（Xylem在句子中的用法）

• The xylem of ferns and conifers contains only tracheids. 蕨类植物和针叶树的木质部仅含有管胞.
• Sapwood contains xylem vessels, but not as strong as heartwood. 边材含有木质导管, 但不如中心木质那样坚硬.
• The rest of phloem also produced callus through dedifferentiation. In addition, there was callus from xylem. 残存的韧皮部也可以脱分化形成愈伤组织, 此外, 还存在愈伤组织源于木质部的情况.
• The bine is comprised by cerebral cortex, xylem and fungous marrow. 茎由皮层.木质部和海绵状的髓组成.