| 释义 |
meristematic tissue短语¹⁴⁴⁹⁷²⁺²
基本例句
分生组织
It may develop by thickening of the secondary walls of parenchyma cells, or it may arise directly from meristematic cells.它们可能由薄壁组织的细胞壁次生加厚而成，也可能直接来自于分生组织细胞。
It is constantly replaced by newly formed cells as the older tissue is sloughed off with growth of the root through the soil.随着根尖的生长，根冠外层的薄壁细胞与土壤颗粒磨擦，不断脱落，死亡，由其内的分生组织细胞不断分裂，补充到根冠，使根冠保持一定的厚度。 |