21. orbit the Earth 14 times　　 = go round the Earth 14　 times　 绕地球运行14圈

20. last 持续 The rain lasted a week. 雨持续了一个星期。

　 last 上一个 last Wednesday, last night, last year

19. be called 被称作 He was called “Xiao Zhang”.

　The boy called Kexiang is playing basketball. 　叫可祥的那个男孩正在打蓝球。

18. return to Earth　 返回地球

17. a few days ago 几天前　　 19. He was Yang Liwei, the pilot, with a wife…

16.　 China’s first astronaut 中国的第一位宇航员

15. What did the Chinese do when he died? 当他去世了中国人做了什么？

14. through 穿过(内部)　 through a mountain/ forest / window

　 across 横穿 (表面)across the road/ bridge

13. over 垂直上方，不接触 　The bridge is over the river.

12. a railroad is for trains. 铁路是给火车用的。