形容词
中文翻译：首要的
同义词：
['primary', 'primary-stage', 'primal']
例句：
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1.The primary function of this machine is to clean the water.
这台机器的主要功能是清洁水。
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2.The primary goal of the project is to reduce carbon emissions.
该项目的首要目标是减少碳排放。
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3.The primary reason for the delay was a technical issue with the software.
延误的主要原因是一个软件的技术问题。