考夫曼博士表示，由于国家规定防腐剂必须为高酸性，精加工与灌装食品的酸性尤其的强。

Processed and bottled foods are particularly acidic because of federal rules requiring high acidity as a preservative, Dr.Koufman says.

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pH值越低，酸性越高；无糖苏打饮料（pH2.9-3.7）、草莓（pH3.5）以及烧烤调味酱（pH3.7）等食物饮料均属高酸食品。

The lower the pH, the higher the acidity; highly acidic foods and beverages include diet sodas (2.9 to 3.7), strawberries (3.5) and barbecue sauce (3.7).

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考夫曼博士表示，由于国家规定防腐剂必须为高酸性，精加工与灌装食品的酸性尤其的强。

Processed and bottled foods are particularly acidic because of federal rules requiring high acidity as a preservative, Dr. Koufman says.

youdao