adj.意外的，偶然的
n.偶然，次要方面

原形：accidental复数：accidentals

I'm confident that the dentist will deny the confidential accidental incident.
我确信牙医会否认那个机密的意外事件.
an accidental meeting
偶然的相遇,邂逅
Large accidental spills have occurred.
发生大量泄漏事故。
It was an accidental meeting, we hadn't seen each other in years.
这是一个偶然的相遇，我们已经很多年没见了。
The spill on the floor was purely accidental; nobody meant to knock over the glass.
地板上的溢出完全是意外，没有人故意打翻玻璃杯。
The child accidentally locked himself in the bathroom, causing quite a panic for the parents.
孩子不小心把自己锁在浴室里，让父母非常惊慌。
The athlete's injury was a result of an accidental collision during the game.
运动员的受伤是比赛中意外碰撞的结果。
She deleted important files accidentally while trying to clean up her computer.
她在清理电脑时不小心删除了重要文件。
The fire started from an accidental electrical short circuit.
火灾是由意外的电气短路引起的。
His accidental discovery of penicillin revolutionized medicine.
他偶然发现的青霉素彻底改变了医学。
The dog's escape from the yard was an unfortunate accident.
狗从院子里逃出来是一个不幸的意外。
I accidentally sent the email to the wrong address; please disregard it.
我误将邮件发送到了错误的地址，请忽略它。
While painting, I accidentally splashed some color on my favorite shirt.
画画时，我不小心把颜料溅到了我最喜欢的衣服上。