结果小儿纵隔肠源性囊肿多位于中后纵隔，呈圆形或椭圆形，密度均匀，边缘清楚。
Results All the cysts were located in mid-posterior mediastinum, presenting as a round or oval mass with clear border and homogeneous density.
但是，由于涉及椭圆积分，一般又不具有均匀电荷环空间势分布的对称性，求解和讨论是比较困难的。
However, because this problem involves elliptic integrals, generally not possessing symmetry of a uniformly charged ring, it is difficult to solve and discuss it.
最后用椭圆偏振测量的方法分析了碲镉汞的横向和纵向组分均匀性。
Finally, the transverse and longitudinal compositional uniformity of HgCdTe is analyzed by ellipsometric measurement which is a nondestructive, effective and r.
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