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念念不忘；执著
If you have a preoccupation with something or someone, you keep thinking about them because they are important to you.
例句
Karouzos's poetry shows a profound preoccupation with the Orthodox Church...
卡鲁佐斯的诗歌表明他对东正教的执着。
In his preoccupation with Robyn, Crook had neglected everything.
克鲁克一心想着罗宾，忽略了其他一切事情。