Mean height, diameter at breast height (DBH) and stand biomass were 44.8%, 32.7%and 139.76% higher in the mixed stand than in the poplar pure stand respectively.是什么意思_Mean height, diameter at breast height (DBH) and stand biomass were 44.8%, 32.7%and 139.76% higher in the mixed stand than in the poplar pure stand respectively.在线翻译_英语_读音_用法_例句