unpremeditated

unpremeditated homicide

非杀人

it was a totally unpremeditated attack.

这完全是突然袭击。

All growth is a leap in the dark, a spontaneous unpremeditated act without the benefit of experience.

所有的成长是一种在黑暗中的跳越，一种自发性非有经验的益处的行动。

asked an unpremeditated question. Something that isad-lib is spontaneous and improvised and therefore not part of a prepared script or score:

随口提出一个问题。 ad-lib 的事物是自发产生的和即兴而作的， 因而是先准备的手稿或记录的部分：