常見(jiàn)例句Keywords Pupulus deltoides;Vascular cambium;initiation;development; 美洲黑楊;維琯形成層;發(fā)生;發(fā)育;Excessive Depletive Dynamic of Soil Water of Pupulus simonii in Loess Hilly Region 黃土丘陵區(qū)小葉楊林地土壤水分過(guò)耗動(dòng)態(tài)Pupulus bollean 新疆楊 返回 Pupulus