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no idea
01
без понятия, понятия не имею
used to express complete lack of knowledge or understanding about a particular topic, question, or situation
Примеры
No idea, I haven't thought about it yet.
Без понятия, я еще не думал об этом.
to have no idea
01
to not know something or be unsure about it
коллокация
Примеры
I have no idea where my keys are.
