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to prevent people from entering an area or building, often because it is dangerous
阻止人們進入一個區(qū)域或建筑物,通常是因為那里很危險;封鎖,隔離
Two more bombs have been discovered since the police sealed off the area.
警察將這個地區(qū)封鎖后,又發(fā)現(xiàn)了兩枚炸彈。
Windows are usually sealed off.
窗戶通常是封閉的。