outer radiation belt [of the earth]

例句：

1. 1. The outer radiation belt is a region of space where particles from the sun are accelerated.
   外层辐射带是太阳粒子被加速的区域。
2. 2. The study of the outer radiation belt has provided important insights into the behavior of cosmic rays.
   研究外层辐射带为宇宙射线的行为提供了重要的见解。
3. 3. The outer radiation belt is a crucial area for studying the origin and evolution of cosmic rays.
   外层辐射带是研究宇宙射线起源和演化的关键区域。