English: What is one notable achievement or contribution made by Sergei Ivanov during his career?
translation: 謝爾蓋·鮑里索維奇·伊凡諾夫在他的職業生涯中取得的顯著成就或貢獻是什麼？
translation: 謝爾蓋·鮑里索維奇·伊凡諾夫的職業生涯中取得的顯著成就或貢獻是什麼？