I wasn't particularly interested in physics.我对物理不是特别感兴趣。

I think the young man is getting interested in gardening.我觉得这个年轻人开始对园艺感兴趣了。

I'm not interested我没兴趣(表示拒绝)

No thanks, I'm not interested.不了, 谢谢, 我没兴趣。

He asked me if I wanted to come along but I told him I wasn't interested.他问我是否愿意来, 但是我告诉他我没兴趣。