成功不是天上掉下来的馅饼,而是不断累积的努力凝结而成的果实。渥沦·哈特葛伦在年轻的时候曾经是一名挖砂工人。长年累月的劳作使他萌发了必须要成就自己的人生事业的欲望——想要成为研究南非树蛙的专家。按照哈特葛伦所受的教育,本来他不具备这方面的才能,但是他从1969年开始就把大部分的时间 Success is not the pie that has fallen from the sky, but the fruit of the cumulative effort. Otto Hartgren used to be a sand-digger when he was a young man. Years of work have given him the urge to succeed in his own life - to become an expert on tree frogs in South Africa. According to Hart Gedlen’s education, he did not have this ability, but he has been most of the time since 1969