晚安”這兩字比任何的一句甜言蜜語都溫馨。。。
Sunk costs - Wikipedia, the free encyclopedia晚安”這兩字比任何的一句甜言蜜語都溫馨。。。In economics and business decision-making, a sunk cost is a cost that has already been incurred and cannot be recovered. Sunk costs are sometimes contrasted with prospective costs, which are future costs that may be incurred or changed if an action is tak...
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