luminous

水晶吊灯在阳光下闪烁着晶莹的光芒。

The chandelier appeared ___luminous in the sunlight.

萤火虫在夜晚发出微弱而美丽的光芒。

Fireflies emit a soft and beautiful ___luminous glow at night.

她的讲解如此清晰明了，让复杂的概念变得容易理解。

Her ___luminous explanation made the difficult concept easy to understand.