“ Salesmanship, too, is an art; the perfection of its technique requires study and practice. 推销也是一门艺术;其技术的完善需要学习和实践。 J. C. Penney J.C.彭尼
“ The world hates change, yet it is the only thing that has brought progress. 世界讨厌变革,但变革是唯一带来进步的东西。 Charles F. Kettering 查尔斯·凯特林