urban green的用法和樣例：
例句
- The soil seed bank of urban green land contains some potential populations, some plants can be used for city afforestation.
城市綠地土壤種子庫中蘊藏著(zhù)一些潛在種群，有些植物種可以用于城市綠化建設。 - Three-dimensional ecological characters of urban green space and its ecological function.
城市綠地的三維生態(tài)特征及其生態(tài)功能。
