seal off
US /siːl ɔːf/
UK /siːl ɒf/
短语动词
封锁, 隔绝
to prevent people from entering or leaving an area, especially by using a physical barrier
示例:
•
Police have sealed off the street where the accident happened.
警察已经封锁了事故发生的街道。
•
The area was sealed off for security reasons.
出于安全原因，该区域被封锁了。