名词
中文翻译：核心
同义词：
['core', 'center例句：1. The nucleus of the seed is where the sporangia are located.（种子的核心是孢原所在的位置。）']
例句：
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1. The nucleus of the seed is where the sporangia are located.
种子的核心是孢原所在的位置。
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2.The center of the city is bustling with activity.
市中心繁忙活跃。
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3. The nucleus of the cell is the nucleolus.
细胞的核心是核仁。