In the 20th century political frontiers became a central influence on economic life .
20世纪，政治边界对经济生活产生了重要影响。
Guarding their nation 's frontiers has traditionally been an honourable task for greeks .
对于希腊人来说，保卫自己国家边境自古以来就是一件值得尊敬任务。
But since computers are much faster than humans when it comes to computation , we hope that new frontiers will be broken - enabling us to solve the problems that were unreachable before .
由于电脑的计算速度远远超过人类，我们希望新的疆界将被打破，使我们能够解决一些以前无法解决的问题.
Once frontiers were changed by armies . Now the job is done by global warming .
过去只有军队才能改变国家的边界，现在同样一件事，全球气候变暖也做到了。
In an age when our frontiers are digital , the criminal system threatens something intangible but incredibly valuable .
