形容词
中文翻译：Unknown
同义词：
['secret', 'clandestine', 'covert']
例句：
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1.The subreptitious plan was to keep the project a secret until the final reveal.
这个秘密的计划是保持项目的秘密，直到最后揭晓。
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2. The team worked in complete secrecy, with only a few trusted members knowing their plans.
团队完全保密工作，只有少数信任的成员知道他们的计划。
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3. The subreptitious approach to marketing has proven successful in attracting new customers.
这种秘密营销的方法已经证明在吸引新客户方面非常成功。