人为某样东西实际支付的成本至少是标价的两倍,因为买来后设置、学习、维护、修理,以及最后处置,也需要耗费精力、时间和钱。不是所有的实际成本都在价签上。实际成本是标价的2倍。
没有执行的愿景只是一个梦想。
The only thing that separates successful people from the others is hard work and determination.
Consciousness serves the organism's need to interact effectively with its world.