这类化合物的PH值很大，会令皮肤，迥殊是老化皮肤，变得枯燥。
This combination has a high PH and is drying to skin, particularly to aging skin.
这项研究为了进一步明了怎样改善老化皮肤迈出重要一步，研究者说。
This research serves as an important step forward in the understanding of how aging skin can be improved, researchers say.
数值模拟的结果表明：合理选择光辐射波长、辐射曝光时间和曝光剂量，可以选择性的热破坏光老化皮肤中的病损组织。
The results of numerical simulation show the lesion of photoaging skin can be selectively damaged if the wavelength, exposure duration and exposure dose of irradiated ligh are reasonably selected.
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