形容词
中文翻译：主要的
同义词：
['primary', 'fundamental', 'primary factor例句：1. The primary goal 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 goal 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 reason for the delay was a lack of resources.
延误的主要原因是因为缺乏资源。
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3.Primary school education is crucial for children's development.
小学教育对于儿童的发展至关重要。