Researchers are also exploring new ways of boosting the skin's ability to retain moisture as well as to keep germs from seeping into the body.

研究人员们也探索着新的方法，加强皮肤保湿能力，并阻挡细菌渗入身体。

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Exceed certain quantity to turn over and reduce soil retain water to preserve soil moisture ability, for trees growth disadvantage.

超过一定量反而降低土壤蓄水保墒能力，对树木生长不利。

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