English version

one-track mind

From Longman Dictionary of Contemporary Englishone-track mindˌone-track ˈmind noun 🔊 🔊 have a one-track mind
Examples from the Corpus
one-track mindNow, an animal has a one-track mind.I was a fully equipped birdwatcher, very inexperienced, perhaps, but with a one-track mind.But all my wit and wisdom were wasted on Karen's one-track mind.
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