a significant or sudden development or discovery; an important achievement
значительное или неожиданное развитие или открытие; важное достижение (znachitel'noe ili neozhidannoe razvitie ili otkrytie; vazhnoe dostizhenie)
"The scientist made a major breakthrough in his research on cancer treatment."
"Учёный сделал большой breykfru в своих исследованиях лечения рака." (Uchyonij sdelal bol'shoy **breakthrough** v svoikh issledovaniyakh lecheniya raka.)
a small or trivial lie
to take responsibility for one's actions or decisions
jealousy personified or described as a destructive force
to become extremely popular online
to teach someone how to do a job or task
to be in a difficult or tricky situation
