常见例句用作形容词 (adj.)It was hitting pockets of compressed air.它陷入了压缩空的气潭。I was going to call and see when you're free.我原来想在你有空的时候去拜访你。Vacuum packaging is produced by pumping all the air out of the package.真空的包装都是用抽气机把空气抽出的。 返回 air-free