spheric aberration的用法和样例：
例句
- A very small lens aperture is employed to correct spherical aberration, but this sevrely limits the final resolution.
可以用一个非常小的透镜孔阑来校正球差，但这会严重地影响最终鉴别率。 - Cloudy Nights ask me to explain what the spherical aberrations undercorrected and overcorrected mean and how to tell what you have as you almost always have at least one.
论坛让我再解释一下球差较正不够和过度是什么意思，以及如何辨别。
