curious about指的是对某事很好奇

举个例子 I am curious about the content of this book. 我对这本书的内容感到很好奇。

satisfied with表示对某事感到满意

She is satisfied with what her parents sent her as her birthday present. 她对父母送她的礼物感到非常满意。

be happy to是指乐于做某事

The president claims that he is happy to devote for the citizens. 总统表示他非常乐于为公民奉献。

三个是形式相同 但是意义不同的形容词词组。