这些气体溶于大气层中的水汽，形成弱酸。
These gases may dissolve in water in the atmosphere to form weak acids.
二是强、弱酸树脂的选型。
弱酸性条件会增加变色的程度。
具有与人体肌肤吻合的弱酸性，温和自然。
With the slight acidity matching the human skin, it is mild and natural.
具有与人体肌肤吻合的弱酸性，温和自然。
With the slight acidity matching the human skin, it is mild and natural.
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