名词
中文翻译：Unknown
同义词：
['verification', 'authentication', 'identification']
例句：
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1. The police officer performed a thorough identification of the suspect.
警察官员对嫌疑人进行了彻底的识别。
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2. The bank required a valid identification card to open an account.
银行要求出示有效的身份证才能开户。
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3. The scientist conducted an identification test to confirm the identity of the unknown sample.
科学家进行了鉴定测试，以确认未知样本的身份。