nucleus

n. /ˈnuː.kli.əs/ B1

核心；细胞核

The central and most important part of an object, movement, or cell.

仙境例句

Each tiny cell had a dark round nucleus in its middle, like the stone in a cherry.

每个小细胞中间都有一个黑黑的圆细胞核，就像樱桃里的核。