be riveted （因感到有趣而）目不转睛地看，（因害怕而）动弹不得，呆若木鸡 to not be able to stop looking at something because it is so interesting or frightening。

【例句】
It was a riveting story.
那是个非常动听的故事。
 
It was an amazing film - I was absolutely riveted.
那部电影太精彩了——我完全被吸引住了。