1.Deal with the causes of obscuration, not with the sun.
（比如眼翳）需要治理的是障碍的成因，而非太阳。
2.Effect of Central Obscuration Interferograms Fitted with Zernike Circle Polynomials on Calculating Seidel Aberrations
中心遮拦干涉图的圆泽尼克拟合对计算赛德尔像差的影响分析
3.The period of time during which such an obscuration occurs.
蚀的发生期这种天体变暗发生的时间
4.In a word, the Tang Dynasty was the critical period in the transition of the art of the vocality skill from the ancient obscuration to the middle development, and its development in vocality art laid a solid foundation for the flourish of song art after the Song Dynasty.
唐代是我国声乐技艺由远古的蒙昧时期向中古的开发时期转化的关键时期，唐代声乐艺术的发展为宋以后歌唱艺术的繁荣奠定了坚实的基础。
