| 单词 | tracheids |
| 例句 | DEFINITIVE EXAMPLES 权威例句〔metaxylem〕The part of the primary xylem that differentiates after the protoxylem and is characterized by broader vessels and tracheids.后生木质部：初生木质部中不同于原生木质部的一部分，以更宽的导管和管胞为特征美国传统〔pit〕Botany A cavity in the wall of a plant cell where there is no secondary wall, as in fibers, tracheids, and vessels.【植物学】 纹孔：一个没有从属内壁的植物细胞壁里的腔，如在纤维、管胞和导管中美国传统〔xylem〕The supporting and water-conducting tissue of vascular plants, consisting primarily of tracheids and vessels; woody tissue.木质部：在维管束植物中的起支撑作用和输水作用的组织，主要由管胞和管道组成；木质组织美国传统 |
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