keen on表示熱衷于，interesting in表示感興趣，例如：

1.She is also keen on the ballet.她也熱衷于芭蕾舞。

2.I wasn't too keen on going to the party.我不太想去參加這次聚會。

3.People do seem maybe a little bit more interesting in Snowden personally, what some, whether is it.人似乎也許對斯諾登本人有興趣，不知道他本人是否是這樣。