名词
中文翻译：Unknown
同义词：
['primary', 'fundamental', 'basic']
例句：
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1. The company's primary product is electronics.
该公司的主要产品是电子产品。
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2. The researcher focused on the primary stages of the process.
研究者专注于过程的初级阶段。
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3. Students need to take a primary course in mathematics before they can graduate.
学生在毕业前需要先修一门数学基础课程。