lock down
US /ˈlɑkˌdaʊn/
UK /ˈlɒkˌdaʊn/
名词
封锁, 禁闭, 隔离
an emergency measure or state of isolation or restricted access instituted as a security measure
示例:
•
The prison was placed on lockdown after the riot.
骚乱后，监狱进入封锁状态。
•
The city went into a full lockdown to control the spread of the virus.
该市进入全面封锁状态，以控制病毒传播。
短语动词
封锁, 关闭
to secure a building or area by restricting movement and access, typically in an emergency
示例:
•
Police had to lock down the entire neighborhood during the search.
搜查期间，警方不得不封锁整个街区。
•
The school decided to lock down all classrooms after a suspicious package was found.
发现可疑包裹后，学校决定封锁所有教室。