She seemed to have lost interest in food.

她好像对食物不感兴趣了。

《牛津词典》

You'll have lost interest by then.

那时你已经没有兴趣了。

youdao

Customers have lost interest in our products these years.

近来年，顾客对我们的产品失去了兴趣。

youdao

The foot soldiers, be it forest guards or home guards posted around these reserves, have lost interest.

NPR: Poachers Put Bengal Tiger in Additional Peril

Or because like some philandering lover they have lost interest in our charms and just moved on.

FORBES: No Brand Shakedown, Says Facebook--Here's How Page Posts Reach Fans (Or Don't)

Much of the mainstream media, unfortunately, seems to have lost interest in covering the meat and potatoes of government.

CNN: When a sip of water gets more attention than a president