without provocation

基本解释

The unarmed man was allegedly pulled from his home and shot to death without provocation.
據稱，這名徒手的平民被從家中拽出，無緣無故即被槍殺。
They sting or bite without provocation; they fly uninvited into our rooms on summer nights, or beat ageist our lighted windows.
它們無緣無故地又叮又咬；夏天的晚上，它們未經邀請便飛到我們房間裡，或者對著露出亮光的窗戶亂撲亂撞。
Among subjects who hadn't eaten the raisin, those who were told they'd been rejected by the group became aggressive, inflicting long and painful sonic blasts without provocation.
在沒有喫葡萄乾的研究對象裡，那些被告知被團躰拒絕了的人在沒有受到刺激的情況下變得好鬭，造成持續時間長而痛苦的快速爆發。

In 1976, North Korean soldiers viciously murdered American servicemen with axes without provocation.
CENTERFORSECURITYPOLICY: Center for Security Policy Must History Repeat Itself? Congress Should Not Invite North Korean Aggression