名词
中文翻译：核球体
同义词：
['nucleus', 'nucleolus']
例句：
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1.The cell's nucleus contains the DNA and is where the cell's instructions are stored.
细胞的核内含有DNA，是细胞指令存储的地方。
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2.The nucleus of the cell is a small ball-shaped structure that contains the cell's DNA.
细胞核是一个小球状结构，里面含有细胞的DNA。
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3. The nucleus of the cell is responsible for producing proteins and other essential molecules.
细胞核负责产生蛋白质和其他必需分子。