very interested 入迷的;极感兴趣的 The children watched, fascinated, as the picture began to appear. 电影开始以后孩子们入迷地观看着。 - fascinated by something
I've always been fascinated by his ideas. 我总是对他的想法极感兴趣。 - fascinated to see, learn, etc.
They were fascinated to see that it was similar to one they had at home. 他们发现这个和他们家中的那个相似,极感兴趣。