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- Centripetal xylem differentiates from the outside toward the center, and a centripetal inflorescence (e.g. the capitulum) is one in which the outer flowers open before those in the center. 向心的木质部的分化是从外向内的，向心式的花序（头状花序）是外面的花比中央的花先开放。
- centripetal xylem 向心木质部
- 10. Centripetal xylem differentiates from the outside toward the center, and a centripetal inflorescence (e.g. the capitulum) is one in which the outer flowers open before those in the center. 向心的木质部的分化是从外向内的，向心式的花序（头状花序）是外面的花比中央的花先开放。收藏指正
- It is called the centripetal acceleration. 这叫做向心加速度。
- The structure of A Rose for Emily is centripetal. 福克纳的《献给艾米莉的玫瑰》的艺术结构是向心式的 ;
- A cell in the xylem of vascular plants. 管胞在维管植物的木质部中的细胞
- Lignified tissues include SCLERENCHYMA and XYLEM. 木质素组织包括厚壁组织和木质部。
- The xylem of ferns only contains tracheids. 蕨类植物的木质部只含有管胞。
- The first formed xylem that differentiates from the procambium. 原生木质部最先形成的木质部，与原形成层不同
- The centripetal effects of a homogeneous population. 同类人种倾向集中的作用
- The comparison shows the centripetal tendency of the complements. 比较之后，可以看出补语演变过程中的向心趋势。
- 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。
- Primary xylem Xylem derived from the procambium in the young plant. 初生木质部：指幼嫩植物中来源于原形成层的木质部。
- 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。
- Observation and Study of Vessel Elements of Secondary Xylem in. 次生木质部导管分子观察研究。
- 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 vascular cambium is located between the xylem and the phloem. 维管形成层位于木韧之间。
- After some treatment of centripetal force, he deduces Kepler's third law. 在向心力的一些论述之后,他推出了开普勒的第三定律。
- The development of xylem is of mesarch.Stomata are monocyclic type. 叶脉、叶柄、上胚轴的维管束均为外韧型。
