acidity and basicity的用法和樣例：
例句
- In acid and alkali soil, there are mainly indissoluble bivalent or trivalent phosphates, which cannot be utilized by plants.
在酸鹼性土壤中，磷主要以植物難以吸收利用的難溶性二價或三價陽離子的形式存在。 - The interrelations between acid rain and soil ecosystem are analysed.Acid rain could change soil acidity, enhance soil toxicity, reduce soil active,destroy soil structure.
酸雨能改變土壤生態系統中土壤酸鹼性，增加土壤毒害，降低土壤活性，破壞土壤結構，同時土壤生態系統影響酸雨的形成和污染。
