adj.瞬间的,即刻的,猝发的
Death was instantaneous because both bullets hit the heart.
因为两颗子弹都击中了心脏,所以死亡是瞬间发生的。
Death was almost instantaneous.
当时生命垂危。
His hospitality was instantaneous and all-embracing.
无论何时无论对谁他都是很好客的。