夜晚的沼泽地上，一团闪烁的磷火在远处飘忽不定。

In the night marsh, a flickering ___will-o-the-wisp danced in the distance.

她追求的名利到头来不过是镜花水月，永远无法真正拥有。

The fame and fortune she chased turned out to be just a ___will-o'-the-wisp, always out of reach.