1. It was a curious feeling, as though we were floating on air. 那是一种奇特的感觉，我们仿佛在空中漂浮。
2. Wind movements are also modified in cities because buildings increase the friction on air flowing around them. 风向在城市里也会改变，因为建筑物增加了它们周围流动的空气的摩擦力。
3. In South Africa, as in many developing and newly industrialized countries, legislation on air pollution has failed to keep pace with mushrooming industries. 同许多发展中国家和新兴工业化国家一样，在南非，关于空气污染的立法未能跟上迅速发展的工业的速度。
4. We will be back on air tomorrow morning at 7. 明天早上7点本节目重新开播。
5. The air force and the navy retain their prohibition of women on air combat missions. 空军和海军都保留了对女性空中作战任务的禁止。
