研究生科技英语阅读课文翻译对照(25)

虫洞也会遇到这种问题，只不过声音换成了辐射。一旦虫洞变大，大自然的辐射物会进入，最终形成一个环路。反馈变得如此强劲，最终摧毁虫洞。虽然微型虫洞确实存在，也有可能在某一天不断膨胀，但持续时间不会太长久，所以不能当作时间机器使用。
Any kind of time travel to the past through wormholes or any other method is probably impossible, otherwise paradoxes would occur. So sadly, it looks like time travel to the past is never going to happen. A disappointment for dinosaur hunters and a relief for historians.
任何通过虫洞和其他方式回到过去的时间旅行或许都是不可能的，否则，悖论就会出现.因此，遗憾的是，回到过去的时间旅行应该永远不会上演。对于寻找恐龙的人来说，这会令他们大失所望，但对于历史学家而言，他们可以彻底解脱了。
Unit 5 The end of e-mail age
Email has had a good run as king of communications. But its reign is over.
电子邮件作为通信之王经历了飞速发展。不过它的统治时代已经终结。
In its place, a new generation of services is starting to take hold -- services like Twitter and Facebook and countless others vying for a piece of the new world. And just as email did more than a decade ago, this shift promises to profoundly rewrite the way we communicate -- in ways we can only begin to imagine.
新一代服务开始取而代之，比如Twitter、Facebook和其他无数争着想在新世界中分一杯羹的服务。如同10多年前电子邮件的出现一样，这一转变有望深刻地改写人们通信的方式──以我们刚刚能够开始想像得到的方式。