单词 | surveillance |
释义 | Word Frequency surveillance(sɜːˈveɪləns) noun close observation or supervision maintained over a person, group, etc, esp one in custody or under suspicion Derived forms surveillant (surˈveillant) adjective, noun Word origin C19: from French, from surveiller to watch over, from sur-1 + veiller to keep watch (from Latin vigilāre; see vigil) |
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