alkali

碱、碱性物质化学

An alkali neutralizes an acid to form a salt and water.

碱会中和酸，生成盐和水。

盐碱、碱土农业

Too much alkali in the soil makes farming almost impossible here.

土壤里的盐碱太多，这里几乎无法耕作。

碱性的、含碱的限定名词前

Few crops can survive in these dry alkali soils.

很少有作物能在这种干燥的碱性土壤中存活。