失去兴趣

He gradually cooled on the matter.

他这问题渐渐失兴趣。

Most readers are likely to lose interest when he descends into the realms of rhetorical terminology.

他开始讨论修辞术语，大多数读者很可能会失兴趣。

After an initial burst of enthusiasm for jogging, I gradually lost interest.

一情过之后，跑逐渐失了兴趣。