surveillance
🇺🇸
/sɜːrˈveɪləns/
🇬🇧
/sɜːˈveɪləns/
noun
C1
the act of watching someone or something closely, often to prevent crime or gather information
Police used surveillance cameras to watch the building for suspicious activity.
警方使用监控摄像头密切监视建筑物，以观察可疑活动。
translation
监视
词形变化
Plural
surveillances