n. a part of the cell containing DNA and RNA and responsible for growth and reproduction
n. the positively charged dense center of an atom
n. (astronomy) the center of the head of a comet; consists of small solid particles of ice and frozen gas that vaporizes on approaching the sun to form the coma and tail
n. any histologically identifiable mass of neural cell bodies in the brain or spinal cord
n. 核心, 核子, 原子核, 起点
[计] 核心程序
1. The nucleus of the atom contains protons and neutrons.
原子的核心包含质子和中子。
2. In biology, the nucleus is the control center of the cell.
在生物学中，细胞核是细胞的控制中心。
3. The teacher explained that the nucleus is important for cell division.
老师解释说，细胞核在细胞分裂中很重要。