西瓜单词

xylem是什么意思

xylem

英 ['zaɪləm] 美 ['zaɪləm]

xylem 木质

来自希腊语xylon,木头。

xylem (n.): "woody tissue in higher plants," 1875, from German Xylem, coined from Greek xylon "wood" (see xylo-).

1. 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.

来自辞典例句

2. 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.

3. 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.

4. A system confined to the transport of mineral elements is known as the xylem.: 专门用来运输矿物元素的系统称为木质部.

5. The stele includes all primary tissues derived from the procambium consists of pericycle, phloem and xylem.: 中柱包括从原形成层衍生而来的全部初生组织,由中柱鞘、韧质部和木质部组成.