Epilepsy is defined by two or more unprovoked seizures.(癲癇是指兩次或兩次以上的無端發作。)

There isn't unprovoked love on the world, there isn't unprovoked hate too, the lover the hater, the hater the lover.(這世上沒有無緣無故的愛，也沒有無緣無故的恨。)

This malicious and unprovoked attack astounded him.(這個惡意的無端攻擊使他吃驚。)

The International Shark Attack File describes shark attacks as either provoked or unprovoked.(國際鯊魚攻擊檔案形容鯊魚攻擊要么是受到了挑釁，要么是無故的。)

The attack appeared to be unprovoked and it is thought the killer did not know his victim.(此次襲擊看似一起無故發生的事件，并且據說兇手并不認識遇害者。)

This said the judge was a cold-blooded murder an act of unprovoked aggression for which there was no justification.(法官說，這是一起冷酷的謀殺，是無可辯解的平白無故的攻擊行為。)

The thoughts arose as from a vacuum, unprovoked, and persisted in their senseless hold over my mind.(那些想法仿佛毫無緣故地就從真空中升起，持續占據著我的頭腦；)

An unprovoked attack means the person is alive when bitten. The person is in the shark's environment.(一個“不被激起”攻擊意謂這個人當他被咬后還活著。)

Her angry outburst was totally unprovoked.(她的暴跳如雷完全是無理取鬧。)

They can become suddenly irritable or explosive, even when unprovoked.(即使在無任何原因時，他們也會變的易怒或爆燥。)

This attack was entirely unprovoked.