名词
中文翻译：Unknown
同义词：
['core', 'essence', 'principal', "crux例句：1. The book's main idea is to promote environmental awareness.（这本书的主要目的是提高环保意识。）2. The project's core objective is to reduce carbon emissions.（该项目的核心目标是减少碳排放。）"]
例句：
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1. The book's main idea is to promote environmental awareness.
这本书的主要目的是提高环保意识。
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2. The project's core objective is to reduce carbon emissions.
该项目的核心目标是减少碳排放。
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3.The meeting's crux was the need for immediate action.
会议的要点是迫切需要立即采取行动。