| 单词 | surveillance |
| 释义 | surveillancesurveillance /sɚˈveɪləns/ ●○○ noun [uncountable] 1the act of carefully watching a person or place for signs of possible criminal activities: The suspects are still under surveillance.a surveillance camera/tape etc. (=equipment used for surveillance)2the act of carefully watching the military activities of another country to see what it is planning to do: a surveillance plane/mission/satellite etc. surveillance flights over enemy territory |
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