1
be under surveillance
固定搭配，表示被监控状态。
The suspect has been under surveillance for weeks.
嫌疑犯已被监视数周。
监视；监控
surveillances — plural of surveillance
先理解核心含义，再看它在真实句子里的用法。
监视；监控
Close observation of a person, group, or place, especially by authorities to gather information.
The suspect has been under surveillance for weeks.
嫌疑犯已被监视数周。
多指警方或安全部门对人或场所的持续观察。
对个人或团体的密切观察；对嫌疑人的监视
Close observation of an individual or group; person or persons under suspicion.
对个人或群体的密切监视(通常由警察进行)
close observation of a person or group (usually by the police)
对疾病发生的持续监测
Continuous monitoring of disease occurrence for example.
通过视觉、听觉、电子、摄影或其他方式对地点和人的系统观察
Systematic observation of places and people by visual, aural, electronic, photographic or other means.
The police kept the suspect under surveillance for two weeks before making the arrest.
警方在逮捕前对这名嫌疑人监视了两周。
Many office buildings now use video surveillance to keep employees and visitors safe.
许多办公楼现在使用视频监控来保障员工和访客的安全。
Public health teams carry out disease surveillance so they can respond quickly to new outbreaks.
公共卫生团队进行疾病监测，以便迅速应对新的疫情。
固定搭配，表示被监控状态。
The suspect has been under surveillance for weeks.
嫌疑犯已被监视数周。
The police maintained constant surveillance of the building.
警方对该建筑进行了持续监视。
They conducted surveillance on the group for months.
他们对这个团体进行了数月的监视。
Not this
The police surveillanced the suspect.
Use this
The police kept the suspect under surveillance.
surveillance 是名词，不能直接用作动词。应使用 'keep under surveillance' 或 'conduct surveillance on' 表示‘监视’。
Not this
The company installed cameras for supervision of employees.
Use this
The company installed cameras for surveillance of employees.
supervision 指监督指导，surveillance 指秘密监视，语境不同。
Focus on the distinctions below. Other candidates are kept compact until a reliable usage note is available.
受到监视
The suspect was kept under surveillance for 24 hours.
嫌疑犯被监视了24小时。
监控摄像头
Surveillance cameras are installed in every corner of the building.
大楼的每个角落都安装了监控摄像头。
监控系统
The company upgraded its surveillance system to improve security.
公司升级了监控系统以提高安全性。
视频监控
Video surveillance helps deter crime in public areas.
视频监控有助于阻止公共区域的犯罪。
电子监控
The government uses electronic surveillance to gather intelligence.
政府使用电子监控来收集情报。
监控录像
Police reviewed the surveillance footage to identify the thief.
警方查看了监控录像以识别小偷。
被监视
The suspect has been under surveillance for weeks.
嫌疑犯已被监视数周。
监视社会
We are living in an increasingly surveillance society.
我们生活在一个日益监视的社会。
Use surveillances naturally, then get feedback on meaning, tone, grammar, and phrasing.
Revisit a common error or keep this word in your review list.
想象一个哨兵在塔楼上（sur- 上方），手持长矛（lance），揭开幕布（veil）进行监视。
register: mixed; contexts: security, government, technology; note_zh: 多用于正式或技术语境，如安全监控或政府监督
常用搭配：be under surveillance（受到监视）、surveillance of + 被监视对象。
Dictionary facts from DICTIONARY_API_DEV, ECDICT, WIKTIONARY.