The particulates have more acidic pollutants with strong acidity and have the corrodibility to grottoes.

细粒子中有较多的酸性污染物并比粗粒子酸性强，这些细粒子对石窟有侵蚀作用。

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The particulates have more acidic pollutants with strong acidity and have the corrodibility to grottoes.

细粒子中有较多的酸性污染物并比粗粒子酸性强，这些细粒子对石窟有侵蚀作用。

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