进阶英语第五单元翻译

* 姓名

* 教学班

* 汉译英：如何控制火箭的力量是成功发射宇宙飞船的关键。

* 汉译英：二十一世纪见证了因特网的发展

* 汉译英：他们正在执行一个秘密任务

* 英译汉：At that time, the Chinese invention of gunpowder was widely used in rocket for military purposes as well as fireworks.

* 英译汉：Legend has it that in A.D. 1500 a man named Wan Hu prepared his own mission to the stars.