a period of secret surveillance of a building or an area by police in order to observe someone's activities.
一、stake someone or something out
1.to position a person so that someone or something can be observed or followed.
2.to position a person to observe someone or something.
1.To mark the location or limits of something with or as if with stakes:
2.To claim something as one's own:
We ran ahead of the others to stake out a campsite.
The new executive staked a place out in the organization as a technologyexpert.
3.To keep someone or something under surveillance:
三、stake somebody out 祕密的看著某人
四、stake out something 宣示某項東西是你的/祕密地看個某處