保证，证明...

The city should seal off those tunnels.这个城市应该封闭那些隧道.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.Improved injector nozzles seal off better to keep the process leak...

seal off的音标：seal off的英式发音音标为：[si:l ɔf]seal off的美式发音音标为：[sil ɔf]...

The best wines are entitled to a numbered seal of quality.上等葡萄酒可以盖上带编号的优质产品印章。Ministers have put their seal of approval on the proposal.部长们已经批准了该提案。The letter bears the seal of the king.这封信有国王的封印....

seal of的音标：seal of的英式发音音标为：[si:l ɔv]seal of的美式发音音标为：[sil ʌv]...

v.把…封锁起来，拆封，烫开...