city green land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。 - As a main element of urban structure, urban greenbelt plays an important role in the city.
摘要城市綠地作為城市結構中的主要元素，在城市中起著一個重要的作用。
