3. I was about to go back to sleep when suddenly my bedroom became as bright as day .

我刚要再睡，突然我的卧室亮如白昼。

4. Having studied volcanoes now for more than twenty years , I am still amazed at their beauty as well as their potential to cause great damage .

我现在已经从事火山研究20多年了，但我仍然惊羡于它们的美丽以及它们潜在的巨大破坏性。

5. The height of the land varies from 700 metres above sea level to over 2,000 metres and is home to a great diversity of plants and animals .

这里地面的高度由海拔700米到2，000米不等，是多种多样动植物的生长地。

6. It is said that the boy , who had a great gift for language and persuasion , is the father of

the Manchu people .

据说这个男孩就是满族人的祖先，他具有语言天赋和很强的说服力。