atomic distance

例句：

1. 1.The atomic structure of the nucleus is a fundamental principle in physics.
   原子结构是物理学中的一个基本原理。
2. 2. The atomic bomb was used to destroy the city during World War II.
   原子弹在二战期间被用来摧毁城市。
3. 3. The atomic clock is incredibly precise and has been used for timekeeping purposes.
   原子钟非常精确，已经被用于计时目的。