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- Reformation of nitrogen seal of blast furnace gas compressor is introduced. 介绍了高炉煤气压缩机采用氮气密封的改造。
- Police sealed off all the exits from the building. 警方把建筑物的所有出口都封锁住了。
- Air consists chiefly of nitrogen. 空气主要由氮气组成。
- Cook the meat quickly at first to seal in the juices. 一开始要大火烧肉，以便保存肉汁。
- The putty gives a good seal round the window. 窗户四周泥的油灰密封效果很好。
- The computer disk is sent in a sealed container. 计算机软盘装在密封的盒里寄出。
- Our foil packets seal the flavour in. 我们用锡纸包装以保持原味。
- Nitrogen forms most of the Earth's air. 地球上空气的大部分成分是氮气。
- This document carries the royal seal. 这份文件上盖有王室印章。
- The lamp is full of gaseous nitrogen. 灯里充满了气体氮。
- The seal on the bottle has perished. 瓶子的封记已经腐烂。
- Nitrogen forms about 78% of the earth's atmosphere. 氮约占地球大气的百分之七十八。
- The tube was sealed off by fusing the material together. 管子以熔合管端的方法封闭起来了。
- He impressed his seal on the wax. 他在火漆上盖了他的私章。
- The deal needs the government's seal of approval. 这一交易需经政府批准。
- The tube is sealed at both ends. 这管子两端是密封的。
- They sealed the bargain with a handshake. 他们握手成交。
- He signed and sealed the document. 他在文件上签字加封。
- The order was sealed with the king's signet. 这一命令是用国王的印记加封的。
- Seal (up) the window to prevent draughts. 把窗户封起来以防风。
