The personal example of a teacher is the most useful sunshine that nothing can replace for the soul of young people.
教师个人的范例,对于青年人的心灵,是任何东西都不可能代替的最有用的阳光。
The obsession with running is really an obsession with the potential for more and more life.
坚持是数学研究的关键,许多伟大的成果来自于长期的奋斗。