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