accident指偶然发生的不幸事件，即“事故”；incident则指普通的小事件，也指暴力性的政治事件。如：About ten people were killed in the car accident.在这次车祸中大约有10个人丧生。The book is about the July 7th Incident.这本书是关于七七事变的。
accident的用法例句：
1. Captain Cook safely navigated his ship without accident for 100 voyages.
库克船长驾驶的船安全出航100次无事故。
2. Through some unfortunate accident, the information reached me a day late.
由于发生了不幸的意外，我知道消息的时候已经晚了一天。
3. The police say his death was an accident, officially at least.
警方说他的死是个意外，起码官方消息如此。
4. The accident happened on a notorious black spot on the A43.
事故发生在A43号公路上一个出了名的事故多发地段。
5. The police say the killing of the young man was an accident.
警方说这个年轻人被杀是一个意外。
incident例句
1、We need to know the exact time the incident occurred.
我们需要了解事情发生的确切时间。
2、She gave the police a full account of the incident.
她向警方详尽地叙述了所发生的事情。
3、The incident didn't even rate a mention in the Pss.
这件事在报纸上连提都不值得一提。
4、The police said the attack was an isolated incident.
警方称这次袭击只是个别事件。
5、I can be reasonably Pcise about the time of the incident.
我可以相当准确地说出这件事发生的时间。
