形容词
中文翻译：首要的
同义词：
['primordial', 'primary', 'fundamental']
例句：
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1.The primary task is to ensure the safety of the workers.
首要任务是确保工人的安全。
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2. The primary cause of the problem was a lack of communication.
问题的主要原因是没有沟通。
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3. The primary focus of the research was on developing new materials.
研究的重点是开发新材料。