When Steve Jobs walked on to the stage at San Franciscos Yerba Buena Center in January, it capped the most remarkable comeback in modern business history.今年1月，史蒂夫乔布斯(Steve Jobs)走上旧金山芳草地艺术中心(Yerba Buena Center)的舞台发布iPad，完成了现代商业史上最引人注目的一次复出。It wasnt simply a matter of the illness that had sidelined him for half the year before, leaving him severely emaciated and eventually requiring a liver transplant. Little more than a decade earlier, both Mr Jobs career and Apple, the company he had co-
