形容词
中文翻译：主要的
同义词：
['primary', 'primary-order']
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 technical issue.
延误的主要原因是一个技术问题。
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3. The primary function of this device is to measure temperature.
这个设备的主要功能是测量温度。