What you actually pay for something is at least twice the listed price because of the energy， time， money needed to set it up， learn， maintain， repair， and dispose of at the end. Not all prices appear on labels. Actual costs are 2x listed prices.
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。
我不考虑年龄。我考虑的是精神。我考虑的是内心的感受。
By used books. They have the same words as the new ones. Also libraries.
成功需要坚持，面对失败不放弃的能力，并从失败中学习。