urban afforesting and greening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。 - Recent efforts toward the greening of our cities have achieved much, although the results are still far from satisfactory.
對我們的城市綠化最近作出的努力取得了許多成績，但結果仍然遠遠不能令人滿意。
