1、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(fā)生的事件，并且據(jù)說兇手并不認(rèn)識(shí)遇害者。

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

3、Result is really efficacy: down the stairs, unprovoked was pushed from behind a.
結(jié)果真的靈驗(yàn)了：下樓梯時(shí)，無緣無故被人從后面推了一把。

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

5、Several fatal unprovoked attacks in the United States alone have occurred over the years.
近年來，在美國已經(jīng)發(fā)生了幾起人們無緣無故受到鯊魚攻擊的事件。

unprovoked翻譯

a. 未受挑釁的, 無正當(dāng)理由的【法】 無正當(dāng)理由的, 無緣無故的, 未受刺激的 詳情