Display degree of mandibular lateral deformity is aggravating gradually to grow at the same time, which is development trend from mandible shift to the genuine skeleton deformity.
下颌偏斜畸形表现程度随生长发育逐渐加重，从替牙期到恒牙期有从下颌移位向真性骨骼畸形发展的趋势。
However, excessive P addition results in a larger degree of superheat of the melt, hence aggravating the oxidation.
但当P过量时， 则会因熔体过热倾向明显而加剧氧化；
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