1. Travelling at a height of 30,000 feet, far above the clouds, and at over 500 miles an hour is an exhilarating experience.
    腾云驾雾，在30，000 英尺高空以500英里的时速旅行，这种经历令人心旷神怡。

2. Though in those days, travelling was not as easy as it is today, steam boats carried thousands of visitors across the Channel from Europe.
    尽管在当时旅行不像现在这么容易，但汽船还是把成千上万的参观者从欧洲大陆送过了英吉利海峡。

3. Two friends were travelling together through a forest.
    两个朋友在一道旅行，穿过一座森林。

4. Henri Dunant, a Swiss banker, was travelling in northern Italy in the year 1859 when he witnessed the horrors of the Battle of Solferino.
    亨利·杜兰特是瑞士一位银行家。1859年他在意大利北部旅行，曾目睹了索尔伏里诺大战的惨状。

5. Humboldt wrote: "From earliest youth I had dreamed longingly of travelling in faraway countries, rarely visited by Europeans.
    洪堡写道：“很小的时候，我就做梦憧憬着去远方那些欧洲人很少去过的国度旅行。

6. ´At the time the murder was committed, I was travelling on the 8 o´clock train to London,´ said the man.
    "在凶杀发生的时候，我正坐在8点钟开往伦敦的火车上。"那人说。

7. Such an experience befell a certain young girl the first time she was travelling alone.
    一个小姑娘第一次单独出门就碰到了这种情况。

8. Some of them have planets like our earth travelling round them.
    有些恒星带有行星。这些行星像地球一样绕着恒星旋转。

9. People travelling long distances frequently have to decide whether they would prefer to go by land, sea, or air.
    出远门的人常常需要决定是走旱路、水路，还是坐飞机。

10. But belongs to the air, travelling it may be six thousand miles to and from its northern nesting home, feeding its flown young as it flies,
    在空中十分自如，可以飞行6，000英里，可以飞往北方做窝的老家，再从老家飞回；一边飞一边喂养会飞的雏燕，甚至在顶风时也能在气流中滑翔，似乎气流在帮它前进。这些鸟对我们是有益的，