1. Without the air to stop some of the sun´s heat, every part of the earth would be burning hot when the sun´s rays strike it.
    假如没有空气吸收太阳的一些热量，地球在阳光照射下就会灼热不堪。

2. Without the air to hold some of the sun´s heat, the earth would be freezing cold at night, too cold for us to live. 2
    如果没有空气储存大部分太阳热量，地球在夜晚就会冻得冰冷，人们便无法生存。

3. Its citizens breathe air that is dangerously polluted.
    它的公民们呼吸着对他们有很大危害的、被污染了的空气。

4. What causes the acid rain that forms from water passing through polluted air?
    是什么造成了雨水穿过污染的大气而形成的酸雨？

5. The thermometer rises or falls according as the air is hot or cold.
    寒暑表随着空气的冷热而升降。

6. The balloon descended gradually as the air came out.
    气球空气外逸而缓缓下降.

7. The exhaustion of gas from a bus polluted the air.
    从公共汽车排出的气体会污染环境。

8. The foul air is unfit to breathe.
    肮脏的空气不适宜呼吸。

9. Tobacco fumes filled the air in the room.
    室内充满了香烟的烟雾。

10. There is a lot of air in loose snow, and this helps to keep the cold out.
    松散的雪里有大量的空气, 这有助于御寒.