形容词
中文翻译：主要的
同义词：
['first', 'chief', 'primary', 'foremost']
例句：
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1.The primary goal of the project is to improve efficiency.
项目的首要目标是提高效率。
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2. The primary source of income for the family was farming.
家庭的主要收入来源是农业。
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3. The primary reason for their success is their dedication and hard work.
他们成功的主要原因在于他们的奉献和努力工作。