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| English | Russian |
| know off the top of head | хорошо знать и хорошо воспроизводить по памяти (know something off the top of one's head Yeldar Azanbayev) |
| off the top of one's head | спонтанно (george serebryakov) |
| off the top of one's head | без подготовки (I wouldn't be able to tell you that off the top of my head. ART Vancouver) |
| off the top of one's head | сразу (VLZ_58) |