earth radiation

例句：

1. 1. The study of theearth radiation is a hot topic in thefield of geophysics.
   地球辐射研究是地球物理学领域的热门话题。
2. 2. The earthradiation can cause harm to human health.
   地球辐射对人类健康有害。
3. 3. The earth radiation hasbeen studied for decades, but its effectson the environment are still unknown.
   地球辐射已经研究了几十年，但其对环境的影响仍然未知。