[] a substance, strip of material, etc. used to fill a crack so that air, liquid, etc. cannot get in or out 密封垫(或带等)◆Make sure the seal is intact before closing the lid, or air will escape. 在盖上盖子以前,确保密封垫完好无损,否则会漏气。
[] a piece of paper, metal, etc. that is placed across the opening of sth such as a letter, a box, etc. and which has to be broken before the letter or box can be opened 封条
[] an official design or mark, stamped on a document to show that it is genuine and carries the authority of a particular person or organization 印章;印记
[] a thing that makes sth definite 表示确认的事物;保证◆The CEO has given the project his seal of approval. 首席执行官已经正式批准了这个项目。
●under ˈseal () () (about a document) that cannot be copied or made available to the public (文件)密封