名词
中文翻译：核
同义词：
['core', "center例句：1. The cell's nucleus contains the DNA.（细胞的核心包含DNA。）2. The heart's nucleus is responsible for its beating.（心脏的核心负责其跳动。）3. The nucleus of a virus is where it replicates itself.（病毒的核心是它复制自己的地方。）"]
例句：
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1. The cell's nucleus contains the DNA.
细胞的核心包含DNA。
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2. The heart's nucleus is responsible for its beating.
心脏的核心负责其跳动。
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3. The nucleus of a virus is where it replicates itself.
病毒的核心是它复制自己的地方。