Accident 是意外的意思，而traffic 则是交通的意思，区别可以从以下例子看出：
Sorry I come late, as I have had an accident on my way, that was not a traffic accident, there was a lady feeling not well, I helped her. 对不起，我来晚了，因为我在路上出了意外，那不是交通事故，有一位女士感觉不舒服，我帮助了她。
水利万物而不争,
而万物莫能与之争。
