名词
中文翻译：关键
同义词：
['pivot', 'keystone例句：1. The lynchpin of the project is its sustainability.（这个项目的关键就是它的可持续性。）']
例句：
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1. The lynchpin of the project is its sustainability.
这个项目的关键就是它的可持续性。
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2. The lynchpin of their success was their teamwork.
他们成功的关键就是团队协作。
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3. The lynchpin of the agreement was the mutual recognition of each other's interests.
协议的关键就是双方利益的相互认可。