短语
中文翻译：对
同义词：
['necessary to', 'crucial to', 'vital to']
例句：
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1. The success of the project is essential to its completion.
项目的成败对它的完成至关重要。
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2. The team's ability to work together is vital to their success.
团队能否协作对于他们的成功至关重要。
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3. The availability of clean water is essential to human survival.
干净的水对人类生存来说是至关重要的。