1. by accident : 偶然；
名词
1. accident是什么意思
1. It was quite an accident.
这是一桩偶发的事件。
2.
2. John's had an accident: he's been knocked down by a car.
约翰出事了，他被一辆小汽车撞倒了。
3. The discovery was a happy accident.
这一发现出人意料，令人高兴。
4. He died in an automobile accident years ago.
他数年前死于车祸。