aspherical lens

例句：

1. 1. The planet Mercury is known for its asteroid belts, which are spherical in shape.
   水星以其小行星带而闻名，这些小行星带的形状是球形的。
2. 2.The sphere of influence of the moon's gravity extends to about 400 kilometers from the surface.
   月球引力影响的范围大约在400公里左右。
3. 3.The sphere of influence of the sun's gravity is much larger, extending to about 8 billion kilometers.
   太阳引力的影响范围要大得多，大约延伸到80亿公里。