常见例句Keywords Pupulus deltoides;Vascular cambium;initiation;development; 美洲黑楊;維琯形成層;發生;發育;Excessive Depletive Dynamic of Soil Water of Pupulus simonii in Loess Hilly Region 黃土丘陵區小葉楊林地土壤水分過耗動態Pupulus bollean 新疆楊 返回 Pupulus