形容词
中文翻译：主要的
同义词：
['primary', 'chief', 'foremost例句：1. The primary objective of the project is to improve efficiency.（该项目的首要目标是提高效率。）']
例句：
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1. The primary objective of the project is to improve efficiency.
该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 color in this painting is blue.
这幅画的主要颜色是蓝色。