ray centre

例句：

1. 1. The light centre is the point where all the light rays converge.
   光中心是所有光线汇聚的地方。
2. 2.The radial center of the planet is located at its equatorial plane.
   行星的径向中心位于其赤道平面上。
3. 3.The ray centre of the sun's light is the brightest part of the solar disk.
   太阳光线的中心是太阳盘最亮的部分。