The second was increased news reporting about a river so polluted that it caught on fire.

VOA: special.2010.04.21

And what was happening on the police scanner was really interesting because you had ambulances and fire trucks and police cars constantly reporting where they are and what they're doing.

警用扫描仪的作用,非常有趣,因为救护车,和消防车，还有警车不断地,汇报它们的所在地和它们所做的事。

斯坦福公开课 - Twitter之父Jack.Dorsey演讲：好奇和灵感的力量课程节选