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| Russian | English |
| без предупреждения | at a moment's notice (without need of warning. Interex) |
| неожиданно и без предупреждения | like a bolt out of the blue (suddenly and without warning Val_Ships) |
| неожиданно и без предупреждения | like a bolt from the blue (suddenly and without warning Val_Ships) |
| прекратить что-либо без предупреждения | bug out (To abandon someone without warning. Interex) |