1.Utilized fake identification to gain access to people's homes or to conduct surveillance.
他利用一个假身份来接近人们的住宅或者进行监视。
2.During World War I and WW II, the U. S. military enlisted more than 200, 000 pigeons to conduct surveillance and relay messages.
在第一次世界大战和第二次世界大战期间，美军征募了超过20万只鸽子用于实施监测和转达信息。
3.stake out To assign (a police officer, for example) to an area to conduct surveillance.
指派（如警官）去一个地区进行监督
4.To conduct surveillance, surprise audits and inspections in corruption prone places or works;
监察、检视及突击审核贪污较易滋长的地方及工作；
5.Conduct surveillance on infection hazards in health care and non-health care setting;
监测医护及非医护环境的感染风险；