Buffer a solution that resists any change in acidity or alkalinity.
可以抵抗任何酸或碱变化的溶液。
Indicator A substance used to test for acidity or alkalinity of a solution by a color change.
是一种用颜色的变化来表示溶液中酸碱程度的物质。
The 5 Percent Rule : Fine-tune the drinking experience with the water's acidity or alkalinity.
法则：以水的酸性和碱性微调我们喝水过程体验。
The degree of acidity or alkalinity of any solution, then, can be most conveniently expressed by the PH system.
因此 ，任何溶液的酸碱度都可以用PH体系来表示。采用这种方法极为方便。
The degree of acidity or alkalinity of any solution, then, can be most conveniently expressed by the PH system.
因此 ，任何溶液的酸碱度都可以用PH体系来表示。采用这种方法极为方便。
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