闪闪 + 的 + Noun
闪闪 (shǎnshǎn) is a reduplicated adjective meaning "sparkling," "glittering," or "twinkling." Reduplication of 闪 intensifies the visual effect of light flickering or shimmering. It is often used with 发光 (fāguāng) in the set phrase 闪闪发光 meaning "to sparkle and shine."
夜空中的星星闪闪发光,美极了。
Yè kōng zhōng de xīngxīng shǎnshǎn fāguāng, měi jí le.
The stars in the night sky were sparkling and shining, absolutely beautiful.
小女孩穿着一条闪闪的裙子,开心地跳舞。
Xiǎo nǚhái chuān zhe yī tiáo shǎnshǎn de qúnzi, kāixīn de tiàowǔ.
The little girl wore a sparkly dress and danced happily.
河面上的阳光闪闪的,像撒了一层金子。
Hé miàn shàng de yángguāng shǎnshǎn de, xiàng sǎ le yī céng jīnzi.
The sunlight on the river surface was sparkling, like a layer of gold had been sprinkled on it.