(chiefly poetic/literary)(主诗/ 文〉)soon passing out of sight, memory, or existence; quickly fading or disappearing 迅速消失(或消散)的 a shimmering evanescent bubble. 闪闪发光但迅速消失的气泡。 ■(Physics)denoting a field or wave which extends into a region where it cannot propagate and whose amplitude therefore decreases with distance (物理)(场,波)渐逝的
派生 evanescence noun evanescently adverb 语源
early 18th cent. (in the sense 'almost imperceptible'): from Latin evanescent- 'disappearing', from the verb evanescere (see evanesce)