名词
中文翻译：认证
同义词：
['validation', 'accreditation', 'endorsement']
例句：
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1. The company requires all employees to complete annual certification exams.
该公司要求所有员工完成年度认证考试。
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2. The certification process involves passing a series of tests and demonstrating knowledge in the subject matter.
认证过程包括通过一系列测试和展示对该学科的知识。
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3. The certification is valid for five years from the date of issue.
该证书自签发之日起有效期为五年。