to shine brightly with a lot of small points of light

The snow/sea sparkled in the sunlight. 雪／大海在阳光下闪烁。

If a person or performance sparkles, they are energetic, interesting, and exciting.

Alice is shy and quiet at parties, but her sister really sparkles! 艾丽斯在聚会上安静腼腆，而她妹妹却活力四射。

bright shine

The radiant smile and the sparkle in her blue eyes were the clear signs of a woman still deeply in love. 她灿烂的笑容和蓝色眼睛里那飞扬的神采都是热恋中女子的明显标志。

energy and interest

Their latest performance of My Fair Lady really lacked sparkle. 他们最近一次《窈窕淑女》的演出实在是毫无亮点。

The sparkle went out of/left her (= she became unhappy) after her husband died. 丈夫去世后，她便失去了往日的活力。