形容词
中文翻译：主要的
同义词：
['primordial', 'primal', 'primary']
例句：
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1.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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2.The primary reason for the delay was a lack of funding.
延误的主要原因是没有资金。
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3.The primary method of communication in this region is through radio.
该地区的主要通讯方式是通过无线电。