谁能帮我翻译一下大学英语书上的中译英

Question

1，过去的十年目睹了计算机科学与技术以令人目眩的速度飞速进展。
2，这座核电厂已经存在20年了，但是它10年前突然停止了运行，真是叫人难以理解。
3，一旦把计算机连上因特网，你会发现网上的许多服务-——例如电子邮件——都是免费提供的。
4，我在一生的不同阶段当过老师，推销员，经理等等。现在我的职业生涯兜了一圈又回到了起点。我又在自己30年前离开的大学里教书了。

这个是21世纪大学英语，第二册的第8课的中译英。希望知道的XDJM告诉我以下标准答案。谢谢

Answer 1

1, The last 10 years have witnessed the Computer Science and Technology to the dizzying speed of rapid progress.
2, The plant has existed for 20 years, but 10 years ago it suddenly stopped running, which very difficult to understand.
3, Once the computer connected to the Internet, you will find that many online services - such as e-mail - are provided free of charge.
4, In different stages of life I have been worked as teacher, salesmen, manager and so on. Now my career touting a lap back to the starting point. I am teaching in the university leaving for 30years .