nucleus
n
(pl nuclei /-klIaI; -klI9aI/)
1 central part, around which other parts are grouped or collected 中心; 核心
The fortress was the nucleus of the ancient city. 这城堡是这座古城的中心.
These paintings will form the nucleus of a new collection, ie Others will be added to them. 这些画将构成新的收藏品的主要部分(还将增加其他收藏品).
2
(a) (physics物) central part of an atom, consisting of protons and neutrons 核, 原子核(包括质子和中子).
(b) (biology 生) central part of a living cell 细胞核.
You were very kind. You brought out all your jewellery and you told me I could take anything I wanted. There were so many beautiful things that it was hard to choose. And then I saw a lovely diamond necklace with a big blue stone in the centre.