evanescent light wave

例句：

1. 1. The sun sets in the west, casting an evanescent shadow over the city.
   太阳在西方落下，给城市投下一道瞬息即逝的影子。
2. 2. The evanescent beauty of a sunset is truly breathtaking.
   夕阳的美丽是短暂而令人惊叹的。
3. 3. The evanescent sparkle of her eyes was enough to make him forget about his troubles.
   她眼中闪烁的光芒足以让他忘记烦恼。