プログレッシブ和英中辞典(第4版)の解説
いっぺん【一変】
欧州の地図は一変した
The map of Europe 「changed completely [underwent drastic changes].
性格が一変した
He became another man.
病勢は寒さで一変した
His disease took a turn for the worse with the cold weather.
近年の技術の進歩は日常生活を一変させた
The progress of technology in recent years has revolutionized everyday life.