另一种方法是改变泥浆的化学性质，使泥浆中的材料更好地发挥作用。
Another is to change the mud chemistry to make the materials already present work better.
本文论及了不锈钢材料的物理化学性质。
The physical and chemical properties of the stainless steel are dealt with in this article.
光致变色材料是一类具有特殊光化学性质的新型功能材料。
Photochromic material is a new kind of functional material that has the special photochemistry property.
光致变色材料是一类具有特殊光化学性质的新型功能材料。
Photochromic material is a new kind of functional material that has the special photochemistry property.
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