spherical catalyst

例句：

1. 1. The sphere is a spherical object with a smooth surface.
   这个球体是一个光滑的表面。
2. 2. The planet Mercury is known for its spherical shape.
   水星以其球形而闻名。
3. 3. The sphere of influence is spherical and can be measured in miles.
   影响力范围是球形的，可以用英里来测量。