radiation belt
noun/ˌreɪdiˈeɪʃn belt/
/ˌreɪdiˈeɪʃn belt/
(astronomy)- a region surrounding a planet where charged particles (= very small pieces of matter) are held in place by the planet's magnetic field
辐射带：围绕行星的区域，在该区域中，带电粒子被行星的磁场固定在适当的位置 - The space mission provided new data on the Earth's radiation belts.
这次太空任务提供了地球辐射带的新数据。
- The space mission provided new data on the Earth's radiation belts.