A: I’m so sorry I failed to take part in the match yesterday, but I wasn’t able to, I’m afraid.
B: Well, don’t you think it’s a bit late to be sorry now?
A:I know that, but there was very little I could do about it.
B: It’s all very well saying that there was very little you could do about it, but because of you we lost the game!
A: Yes, I heard, and I am sorry, but there was an accident on the way and I got stuck in the traffic.
B: But why the hell didn’t you phone us to let us know
1)an unpleasant event, especially in a vehicle, that happens unexpectedly and causes injury or damage (可数名词);(交通)事故;意外遭遇;不测事件
例：He was killed in an accident. 他死于一次车祸。
One in seven accidents is caused by sleepy drivers. 每七次交通事故就有一次是驾车者困倦造成的。
2)something that happens unexpectedly and is not planned in advance (可数或不可数名词)意外;偶然的事
例：Their early arrival was just an accident. 他们早到仅仅是偶然而已。
It is no accident that men fill most of the top jobs in nursing. 男人担任护理中大多数最重要的工作绝非偶然。
【拓展】by accident ： it happens completely by chance 偶然，意外的
如： We met by accident at the airport.