naucleine

例句：

1. 1.The study of nuclear physics is crucial for understanding the structure of the atomic nucleus.
   研究原子核物理学对于理解原子核的结构至关重要。
2. 2.The nucleus of the earth's core is composed mainly of iron and nickel.
   地球核心的核部主要由铁和镍组成。
3. 3.The nucleus of the cell contains the genetic material that determines its characteristics.
   细胞核包含决定其特征的遗传物质。