当暴露于空气中时，表面氧空位能够捕获空气中的氧，有利于表面四方相转变为单斜相。
When the sample is exposed to air, the elimination of these vacancies by the incorporation of oxygen facilitates the transformation from the tetragonal to the monoclinic phase.
结果表明，钢铁的表面电位能在一定程度上较好地反映出其土壤粘附性能。
The results showed that the surface potential could well demonstrate the property of adhesion of steel to soil.
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