盯着太阳看太久后，我的眼前出现了绿色的残影。

After staring at the sun for too long, I saw green ___afterimages in my vision.

那次精彩的音乐会在他心中留下了持久的印象，仿佛余音绕梁。

The amazing concert left a vivid ___afterimage in his mind, like melodies lingering in the air.