自2010年至今的四级考试中， 共出现过 次
自2010年至今的六级考试中， 共出现过 次
N-COUNT 交通事故；车祸 An accident happens when a vehicle hits a person, an object, or another vehicle, causing injury or damage.
She was involved in a serious car accident last week...
Six passengers were killed in the accident.
N-COUNT （不幸的）意外遭遇，不测事件;事故 If someone has an accident, something unpleasant happens to them that was not intended, sometimes causing injury or death.
5,000 people die every year because of accidents in the home...
The police say the killing of the young man was an accident.
N-VAR 意外；偶然 If something happens by accident, it happens completely by chance.
She discovered the problem by accident...
Almost like an accident of nature, this family has produced more talent than seems possible.
PHRASE 可能发生意外的事物（或人） If you describe something or someone as an accident waiting to happen, you mean that they are likely to be a cause of danger in the future, for example because they are in poor condition or behave in an unpredictable way.
A lot of the city's buildings are accidents waiting to happen.
PHRASE 并非偶然;事出有因 You begin a sentence with 'it's no accident' if you want to suggest that something was done deliberately or has a logical explanation, although it might give the impression of having happened by chance.
It's no accident that the boom in police series on TV coincided with the decline of the Western.