失去兴趣

He gradually cooled on the matter.

他对这问题渐渐失兴趣。

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.

一时的热情过之后，我对慢跑逐渐失了兴趣。