| 1. | I used to travel by air a great deal when i was a boy .
当我还是个孩子时，我经常乘飞机旅行。 |
| 2. | We move about, even in jet travel, at speeds far less than the speed of light .
我们即使是乘飞机旅行，运动的速率也远小于光速。 |
| 3. | How do you like traveling by air? it's very speedy and comfortable. i always enjoy it .
你喜欢乘飞机旅行吗？又快又舒服，我一向很喜欢。 |
| 4. | They also have the grave disadvantage of being the most expensive form of transport .
乘飞机旅行还有其严重不利的一面费用最为昂贵。 |
| 5. | We couldn ' t induce the old lady to travel by air
我们无法劝服那老太太乘飞机旅行。 |
| 6. | Travelling by plane is much faster than traveling by car
乘飞机旅行比乘汽车快得多。 |
| 7. | The great virtue of air travel is speed
乘飞机旅行的最大优点是速度快。 |
| 8. | The effects can be used to advantage , too
但是乘飞机旅行对身体的影响也可使之对人有利。 |
| 9. | 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。 |
| 10. | It saves a lot of time to travel by air
乘飞机旅行节约很多时间。 |
