释义:开始时做得好的人确实很多,但能够坚持到底的人却很少。这句话揭示了人们在做事过程中往往容易虎头蛇尾,难以善始善终。 
Mathematics is the foundation upon which we build our understanding of the world, and it is through this understanding that we can solve the most complex problems.
经济理论提供工具,但现实世界的测试会完善它们。