名词
中文翻译：机密文件
同义词：
['confidential file', 'top secret document']
例句：
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1. The government has classified thisinformation as confidential.
政府已将此信息列为机密。
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2. The company's top-secret project is still under wraps.
公司的绝密项目仍在保密中。
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3. The confidentialdocuments were handed over to the security team.
机密文件已交给安全团队。