英语语法分析

The upper pair of ossific centers may develop into preinterparietal bone.

中列分内、外两对骨化中心，能转化为顶间骨；

Objective to analyze the sonographic characteristic of ossific myositis and to evaluate the diagnostic value of color Doppler flow imaging (CDFI) for it.

目的探讨骨化性肌炎的影像学特点及彩色多普勒超声(CDFI)的应用价值。