accident

1. N-COUNT An accident happens when a vehicle hits a person, an object, or another vehicle, causing injury or damage. 交通事故

She was involved in a serious car accident last week. 她上个星期卷入了一场严重的车祸。

2. N-COUNT If someone has an accident, something unpleasant happens to them that was not intended, sometimes causing injury or death. 事故

5,000 people die every year because of accidents in the home. 每年有5千人死于家庭意外事故。

3. N-VAR If something happens by accident, it happens completely by chance. 偶然

She discovered the problem by accident during a visit to a nearby school. 她在去附近一所学校参观时偶然发现了这个问题。