古今中外的许多名人,晚年时依然保持着旺盛的生命力.马克思51岁时,为研究俄国历史而开始学习俄语,由于超人的勤奋,仅半年就能阅读俄文原著.恩格斯一生掌握20多种语言文字,他70多岁时,又攻挪威文,在生命的最后几年,还发奋钻研医学.毛泽东在年逾古稀时学习外语,一个英语单词,常常背诵十多遍.徐特立70多岁学习马列经典著作时,把书中精辟的论述用大字抄出来贴在墙上,每天反复朗读,直到能够背诵为止. Many celebrities, both ancient and modern, still maintain their vitality in their later years.Marx began studying Russian at the age of 51 to study Russian history, and only half a year could read Russian because of superhuman diligence.Engels has over 20 languages Writing, when he was seventy, he attacked Norwegian language and worked hard to study medicine in the last years of his life.Mao Zedong learned foreign languages ​​at an old age, an English word often recited more than a dozen times. When studying the classic books of Marxism-Leninism, the brilliant discourse in the book was printed out in large letters on the wall and read aloud every day until it could be recited.