усвоить урок(The Kremlin hasn't learned the lessons of history. They dream of recreating the Soviet Union, or a kind of ‘Greater Russia' carving up territory based on ethnicity, and language.gov.uk4uzhoj)
усвоить уроки истории(The Kremlin hasn't learned the lessons of history. They dream of recreating the Soviet Union, or a kind of ‘Greater Russia' carving up territory based on ethnicity, and language.gov.uk)
