luminous

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.

新娘走过礼堂过道时，脸上洋溢着喜悦的光彩。

The bride's face was ___luminous with joy as she walked down the aisle.