名词
中文翻译：主要义务
同义词：
['primary duty', 'primary obligation例句：1. The principal obligation of the company is to provide quality products.（公司的首要义务是提供高质量的产品。）']
例句：
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1. The principal obligation of the company is to provide quality products.
公司的首要义务是提供高质量的产品。
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2. He had a principal obligation to attend the meeting.
他有一个首要的义务参加会议。
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3. The government has a principal obligation to protect its citizens.
政府有首要的义务保护其公民。