n. (pl.nucleuses,nuclei ) 核；核心；【生物学】细胞核；核；【物理学】原子核；【化学】有机化合物的原子团，环；(晶)核；【天文学】慧核。 nucleus electron 核电子。 nucleus formation (原子)(晶)核生成(作用)。
the central structure of the lens that is surrounded by the cortex 同义词：lens nucleus,
a part of the cell containing DNA and RNA and responsible for growth and reproduction 同义词：cell nucleus, karyon,
any histologically identifiable mass of neural cell bodies in the brain or spinal cord
a small group of indispensable persons or things; "five periodicals make up the core of their publishing program" 同义词：core, core group,
the positively charged dense center of an atom
(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
例句与用法
1.
Every nucleus lives in splendid isolation . 原子核处于极佳的隔离状态。
2.
A nucleus can have only one y-chromosome . 一个核可以仅有一个Y染色体。
3.
An atom contains a tiny heavy nucleus . 一个原子含有一个微小而重的核。
4.
Nuclei are about as large as a "barn" . 原子核大约是一个“靶”那么大。
5.
The shaded boxes indicate stable nuclei . 有阴影的格子表示稳定的原子核。
6.
What is the "recoil" speed of the nucleus ? 原子核的“反冲”速率是多少？
7.
The hadronic force holds nuclei together . 强子作用力保持原子核为一整体。
8.
Nuclei are composed of protons and neutrons . 原子核是由质子和中子构成的。
9.
Normally, nuclei are not completely isolated . 通常，原子核并不是完全孤立的。
10.
Three nuclei differentiate into the antipodal cells . 三个核分化成为反足细胞。
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