English主要词典
nucleus
Universal Words
1 (physics) the central part of an atom, that contains most of its MASS (= weight) and that carries a positive electric CHARGE
seealsoPROTON, NEUTRON
2 (biology) the central part of some cells, containing the GENETIC material
3 the central part of sth around which other parts are situated or collected:
These paintings will form the nucleus of a new collection.
