死于交通事故的行人中有四分之三不是小于15岁就是超过了60岁。他们不能很好地判断速度，并且会出人意料地踏进马路。

The most effective people are the same whether they are having a conversation with friends or giving a public speech to a large audience and their gesture matches their words.

Three out of four pedestrians killed in traffic accidents are either under 15 or over 60. They may not judge speeds very well and may step into the road unexpectedly.