On the other hand, in 1968 Dietrich Braess, a German operationsresearcher, discovered that adding routes to an already congested network will only slow it down.
You know to be a technical man who only need to take out those operations is easy, but to be a researcher who has a clear idea on what is going on is much more difficult.
大家都知道做一个只会操作实验步骤的技术工人容易，但是要想做一个对实验走向思路清晰的研究者就难得多。
3
Researcher have tested 20 people who underwent gastric bypass operations.