n.韌皮部;篩部
In vascular plants, the xylem and phloem serve to translocate such substances. 維管植物的木質(zhì)部和韌皮部主要進(jìn)行對(duì)這類物質(zhì)進(jìn)行運(yùn)輸。
The secondary phloem consisted of sieve cells and phloem parenchymas. 根的次生韌皮部則由篩胞和韌皮薄壁細(xì)胞組成。