The tinier the bubbles, the greater their internal pressure.
泡泡越小, 内部压强越大.
The tinier the powder, the higher the absorbability and less destruction to skin's keratin layer.
所以,外用珍珠粉是越细越好, 不仅提高了吸收率而且可避免对皮肤角质层造成损伤.
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