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- The air is infected with noisome gases. 空气受到了有害气体的污染。
- The air is dense. 空气混浊。
- Before mixing with the products of combustion, the air is preheated. 空气在与燃烧生成物混合之前要进行预热。
- The autumn sky is clear and the air is crisp. 秋高气爽。
- The air is gas and the diamond is a solid. 空气是气体而金钢石是固体。
- The air is not the domain of winged beasts alone. 天空并不是有翼动物的专有领域。
- The air is thin on the top of a high mountain. 高山顶上的空气稀薄。
- I can breathe better when the air is clean. 当空气很干净时，我才能呼吸的更顺畅一些。
- It is not very cold. The air is fresh today. 不太冷，今天空气较新鲜。
- The air is evacuated from the furnace. 从真空炉中抽出空气。
- The air is made up of a mixture of gases. 空气是由多种气体组合而成的。
- And this somersault in the air is one of his stunt. 这种空中翻滚可是他的绝技之一。
- The higher the mountain is,the thinner the air is. 山越高空气越稀薄。
- During a fog,the air is saturated with moisture. 下雾时空气被湿气浸透。
- Purging a fog,the air is a saturated with moisture. 下雾时空气被湿气浸透。
- It's sunny, but the air is frosty. 虽然是晴天; 但空气很冷.
- The air is fresher in countryside than in city. 乡下比城里空气新鲜。
- Of negative oxygen ions in the air is very high. 负氧离子的含量特别高。
- The higher you climb up the mountain, the rarer the air is. 越往山上爬，空气越稀薄。
- He goes on a hiking trip. The air is so fresh. 他去远足,空气很新鲜。
