nucleus of atom

例句：

1. 1.The nucleus of the earth's magnetic field is located in the core.
   地球磁场的核心位于地核。
2. 2. The scientist discovered a new nucleus of matter.
   科学家发现了一种新的物质核心。
3. 3. The discovery of this nucleus could revolutionize our understanding of physics.
   这一核心的发现可能会彻底改变我们对物理学的理解。