• n. [植] 木質(zhì)部

來(lái)自希臘語(yǔ)xylon,木頭。

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.

邊材含有木質(zhì)導(dǎo)管, 但不如中心木質(zhì)那樣堅(jiān)硬.

來(lái)自辭典例句

2. The xylem of ferns and conifers contains only tracheids.

蕨類植物和針葉樹的木質(zhì)部?jī)H含有管胞.

來(lái)自辭典例句

3. Secondary xylem consists of pitted vessels, parenchyma fibers and rays.

次生木質(zhì)部由孔紋導(dǎo)管 、 薄壁組織及射線所組成.

來(lái)自辭典例句

4. A system confined to the transport of mineral elements is known as the xylem.

專門用來(lái)運(yùn)輸?shù)V物元素的系統(tǒng)稱為木質(zhì)部.

來(lái)自辭典例句

5. The stele includes all primary tissues derived from the procambium consists of pericycle, phloem and xylem.

中柱包括從原形成層衍生而來(lái)的全部初生組織,由中柱鞘 、 韌質(zhì)部和木質(zhì)部組成.

來(lái)自辭典例句