She'd liked him at first, but soon lost interest.

最初她喜欢过他，但很快就失去了兴趣。

《柯林斯英汉双解大词典》

My closest friend, Kim, has lost interest in school and studying.

我最亲密的朋友金已经对学校和学习失去了兴趣。

youdao

Most fared poorly in school not because they lacked ability but because they found school unchallenging and consequently lost interest.

大多数人在学校表现不佳不是因为他们缺乏能力，而是因为他们觉得学校没有挑战性，因此失去了兴趣。

youdao

But she says she lost interest in the official workings of art galleries.

VOA: special.2009.04.08

And if those people, if you're interested in that and I realize at this point I probably lost the interest of most Americans in the room, but for the non-Americans in the room, the people who are interested in the real world as I said before, I'll put that article online and that goes through all the gory detail of this.

如果你们对足球感兴趣的话,我发现,大多数美国的同学对此毫无兴趣,但是那些美国以外的同学,如果你们对现实中的足球比赛很感兴趣,就像我之前说的,我会把文章的详细内容发布到网站上

耶鲁公开课 - 博弈论课程节选

The reason: Pakistan's army felt abandoned when the U.S.lost interest in the region following the Soviet withdrawal from Afghanistan in 1989.

VOA: standard.2010.07.08

Giggs boasts the X-Factor needed to reignite interest among disillusioned Welsh football fans who lost interest in a national team that often failed to inspire under Toshack.

BBC: Brian Flynn - the small man in Wales' big job

It has been a long war, and the American public has understandably lost interest, but these soldiers have not lost their devotion to the mission or their country.

WSJ: Meanwhile, in the War in Afghanistan...

The U.S. Congress has also largely lost interest in how the U.N. handles the money of U.S. taxpayers.

FORBES: Keep An Eye On The U.N.