Feeding comfortable and relieving itching: the cotton, with sub-acidity PH value, is not skin irritant, If meets the requirement of environment protection and human health.
舒适、止痒：亲如皮肤，PH值呈微酸性，对皮肤无刺激、符合环保及人体健康要求。
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).
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 plants and animals that have evolved over time to thrive in slightly alkaline surface waters-their pH is around 8.3-are now having to adapt to a 30% increase in the acidity of their surroundings.
在漫长的进化过程中，海洋动植物已经习惯了海面的弱碱性——PH值大约为8.3，但现在它们不得不去适应所处环境酸度30%的下降。
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