I. ˈunder·cov·er 形 attr, 不变的
- undercover
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II. ˈunder·cov·er 副 不变的
- undercover
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- to operate undercover activities
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- undercover operation 军事
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- Undercoveragent(in)
- undercover agent
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- undercover investigator
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- undercover
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- undercover agent
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- undercover investigation