名词
中文翻译：官方证书
同义词：
['certificate of official origin', 'official document']
例句：
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1. The company issuedan official certificate to the new employee.
公司为新员工颁发了官方证书。
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2.The official certificate is required for the application.
申请需要官方证书。
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3. The official certificate was issued after the successful completion of the project.
项目成功完成后颁发了官方证书。