xylem

• n. [植] 木质部

中文词源

来自希腊语xylon,木头。

英文词源

xylem (n.)

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

双语例句

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.

来自辞典例句

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.

来自辞典例句

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.

来自辞典例句

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.

来自辞典例句