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| почёсывание головы (элемент комфортного поведения) | |||
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| загадочный (Weather experts are baffled after over 100 mature trees were knocked down in Washington State. The head-scratching event occurred in the early morning hours at the Olympic National Park. A mysterious rumbling sound was heard by people living nearby. -- загадочное происшествие (coasttocoastam.com) ART Vancouver) | |||
малопонятный (Sometimes the AI system makes head-scratching decisions.  singularityhub.com Alex_Odeychuk) | |||
| head scratching: 34 phrases in 8 subjects |
| Business | 1 |
| Figurative | 1 |
| General | 18 |
| Idiomatic | 1 |
| Informal | 3 |
| Makarov | 8 |
| News style | 1 |
| Proper and figurative | 1 |