例文
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- This measures the level of acidity or alkalinity in the water.
- What's the pH ( acidity or alkalinity ) of your soil?
- The pH ( acidity or alkalinity ) of soil can be changed depending on the mulch selected.
- Acidity or alkalinity ( pH ) is also a major consideration with regard to closed loop bimetallic circulating systems.
- It looked like some kind of magic until scientists traced the phenomenon to the acidity or alkalinity of the soil, known as the pH factor.
