名词短语
中文翻译：拱顶的核部
同义词：
['核心，枢纽例句：1. The core of the mountain is made up of solid rock.（这座山的核心是由坚硬的岩石组成的。）']
例句：
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1. The core of the mountain is made up of solid rock.
这座山的核心是由坚硬的岩石组成的。
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2. The core of the company's strategy revolves around innovation.
公司战略的核心在于创新。
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3. The core of the problem lies in the need for change.
问题的核心在于需要变革。