名词
中文翻译：Unknown
同义词：
['core', 'center例句：1. The nucleus of the galaxy is located in the center of our solar system.（银河系的中心位于我们太阳系的中心。）']
例句：
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1. The nucleus of the galaxy is located in the center of our solar system.
银河系的中心位于我们太阳系的中心。
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2.The scientists discovered the nucleus of a new planet.
科学家们发现了一个新行星的核心。
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3. The nucleus of the Earth is made up of iron and nickel.
地球的核心由铁和镍组成。