n.核；核心；细胞核；原子核
A nucleus can have only one Y-chromosome. 一个核可以仅有一个Y染色体。
These council will form the nucleus of a future regime. 这些委员会将成为一个未来政权的核心。
These paintings will form the nucleus of a new collection. 这些油画将是新收藏品的核心。
The most important part of the cell is the nucleus. 细胞中最重要的部分是细胞核。
The outermost electron is shielded from the nucleus. 原子核对最外层电子的作用受到屏蔽。
