1. (原子)核 The nucleus of an atom or cell is the central part of it.
e.g. Neutrons and protons are bound together in the nucleus of an atom. 在原子核里，中子和質(zhì)子是結合在一起的。
2. (組織的)核心，中心 The nucleus of a group of people or things is the small number of members which form the most important part of the group.
e.g. The Civic Movement could be the nucleus of a centrist party of the future. 公民運動(dòng)的成員可能會(huì )成為未來(lái)中間派政黨的核心。
nucleus英英釋義
noun
1. the central structure of the lens that is surrounded by the cortex
Synonym: lens nucleus
2. a part of the cell containing DNA and RNA and responsible for growth and reproduction
Synonym: cell nucleuskaryon
3. any histologically identifiable mass of neural cell bodies in the brain or spinal cord
4. a small group of indispensable persons or things
e.g. five periodicals make up the core of their publishing program
Synonym: corecore group
5. the positively charged dense center of an atom
6. (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