1. The class of fliers which harness the air to their purpose, but must yield to its opposition.
    它能自如地驾驭空气，但必须顺气流飞行。

2. London, England's biggest city, often suffers from air pollution which causes more than 1,000 deaths a year.
    英国的第一大城市伦敦，常常遭受空气污染之苦，使每年1000多人死亡。

3. In big cities during cold winter months, many old people die from the polluted air.
    在大城市里, 在寒冷的冬季, 许多老年人死于污染的空气.

4. It comes nearer to the engines with which man has ´conquered´ the air, as he boasts.
    它更近乎于人类自夸的"征服"了空气的发动机。

5. It was the idea of supporting a craft on a ´pad´, or cushion, of low-pressure air, ringed with a curtain of higher pressure air.
    他的设想是：用一个低压空气或软垫来支撑船体，软垫周围用高压空气环绕。

6. If, however, you were holding an open air garden party or a fete it would be equally possible to insure yourself in the event of bad weather.
    如果你要举办一次露天游园会或盛宴，为避免碰上不好的天气而遭受损失也同样可以保险，

7. If she were alive today she would not be able to air her views on her favourite topic of conversation: domestic servants.
    如果她活到今天，她将不能就她热衷的话题"佣人"发表意见了。

8. I used to travel by air a great deal when I was a boy.
    我在幼年的时候，曾多次乘飞机旅行。

9. I am used to travelling by air and only on one occasion have I ever felt frightened.
    我习惯了乘飞机旅行，只是有一次把我吓坏了。

10. It is air-conditioned and beautifully lighted, and its displays are presented with taste.
    该博物馆配有空调设备，灯光设计非常美观，展品也饶有情趣。