surveillance
surveillance — 名詞
1. the activity of closely watching people, buildings, or areas to prevent or solve
監控；監視
持續監看可疑人物或場所
the activity of closely watching people, buildings, or areas to prevent or solve crimes and to collect information for security purposes
Surveillance of the warehouse showed workers leaving goods by the back door at night.
對這座倉庫的監控顯示，工人夜間在後門留下貨物。
The bank manager was kept under police surveillance for three days after the robbery.
搶案發生後，銀行經理受到警方監控長達三天。
collocation: under surveillance
Police surveillance of the area increased after several cars were stolen last month.
上個月發生多起汽車失竊案後，警方加強了對該區域的監控。
Surveillance cameras on the corner recorded a man taking packages from parked cars.
街角的監視器拍到一名男子從停放車輛中拿走包裹。
Electronic surveillance of their phones helped catch the group before the robbery.
對他們的手機進行電子監控，協助警方在搶案發生前逮捕了該集團。
- monitoring
broader term; can refer to routine or technical observation (e.g., health monitoring), not only for crime prevention
- observation
more neutral and general; used in science, medicine, and everyday contexts, not necessarily secretive
- watch
informal and shorter; often used in 'keep watch' or 'under watch,' less technical than surveillance
文法句型
under + surveillance
surveillance + noun (as modifier)
用法筆記
Uncountable noun — do not say 'a surveillance' or 'surveillances.' The idiomatic pattern is 'keep someone/something under surveillance.' Also commonly used as a modifier before nouns ('surveillance camera,' 'surveillance footage').