形容词
中文翻译：关键的
同义词：
['critical', 'essential', 'vital']
例句：
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1. The key to solving theproblem lies in finding a suitable solution.
解决问题的关键在于找到一个合适的解决方案。
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2. Thesuccess of the project dependson the quality of the workdone by the team.
项目的成功取决于团队完成的工作质量。
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3. The key to happinesslies in finding balance between work and leisure.
幸福的关键在于找到工作与休闲之间的平衡。