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covert surveillance; discreet surveillance | |||
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shadowing | |||
surveillance | |||
shade | |||
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shadow |
schaduwen : 11 phrases in 8 subjects |
Communications | 1 |
Earth sciences | 2 |
Health care | 1 |
Industry | 1 |
Information technology | 1 |
Life sciences | 1 |
Medical | 3 |
Technology | 1 |