This carbon dioxide - the same gas that makes fizzy beverages corrosive – is altering the oceans' alkaline-acid balance, known as pH.
二氧化碳——和让饮料滋滋响的同一类气体——正在改变海洋的酸碱平衡，也就是通常说的ph值。
Soil should also be tested for its pH level, a measure of the acid and alkaline balance.
土壤的PH 值也应该测量一下， PH 水平是反映酸碱平衡的量度。
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