随着科技的发展，如今盲人不靠拐杖也能独立行走了。奥地利研发出了一款智能导航鞋，可以探测到4米远的障碍物，堪称盲人的出行利器。 Photo: Tec-Innova

Her are steps to building your enthusiasm:Adopt a definite major purpose.Write out a clear statement of that purpose and your plan for attaining（获得，达到） it. Include a statement of what you intend to give in return for its realization.

As a child I was slave to my impulses; now I am slave to my habits, as are all grown men. I have surrendered my free will to the years of accumulated habits and the past deeds of my life have already marked out a path which threatens to imp