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一些潛在種群，有些植物種可以用於城市綠化建設。 - Three-dimensional ecological characters of urban green space and its ecological function.
城市綠地的三維生態特徵及其生態功能。
