1.=seal up.
2.熨开;脱焊
1.to prevent people from entering an area or a building
1.It did not seem to occur to the police to seal off the entrance or order nobody to leave.
警察似乎没有想到应封锁各入口处或命令任何人不得离开。
2.And I knew that if he got down near where my urostomy bag was, there was a possibility of pulling the seal off it.
我知道，如果他的手滑倒我的尿袋的位置，可能会将密封盖拔下来。
3.The enemy made a desperate attempt to seal off the gap through which we had burst.
敌人拼命想堵住我们已经冲开的那个突破口。
4.This assembly would have powerful rams that could seal off the flow once it was attached to the relevant bit of broken plumbing.
该装置或许拥有强大的活塞，一旦与相关破裂管道相链接，便能封堵井喷。
5.A device used on the outside of the casing of a well to seal off formations or to protect certain zones.
为封堵地层或保护某些层段在井内套管外面所用的装置。
6.The first form of vitamin A helps to seal off parts of the biology under reconstruction or too damaged to be yet repaired.
维他命A的第一种形式，帮助密封生物体中正在重建的部分或过于受损而无法修复的部分。
7.Seal off any gaps around the door and any air intakes with wet towels or sheets.
用湿毛巾和被单塞住门缝及气孔。
8.Reconstruction of such defects should seal off the cranial cavity from the upper respiratory tract and provide structural support.
重建这类缺损必须将颅内和呼吸道分开以及提供大脑的支撑。
9.It did not comment on the move to seal off the town.
他们对于封闭感染城镇的做法没有发表评论。
10.Seal off the city from all outside contact to stop the spread of the plague.
封城，隔绝此城与外界的接触，以避免瘟疫的扩散。