Quite unprompted, Sam started telling us exactly what had happened that night.
萨姆完全出于主动,开始把那天夜里发生的事一一向我们说了出来。
《牛津词典》
But such gloomy views are seldom offered unprompted.
然而,这样的悲观情绪鲜有自发形成。
Such musings are not, of course, unprompted. This year, Amsterdam is celebrating the 400th anniversary of Rembrandt's birth, and it is hard to escape his shadow.