形容词
中文翻译：主要的
同义词：
['primary', 'fundamental', 'primary importance', 'principal']
例句：
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1. Theprimary 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 his absence was a sudden illness.
他缺席的主要原因是一个突发的疾病。
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3.The primary function of this device is to heat water.
这个设备的主功能是加热水。