只比较核心成本。关联成本很难比较和计算的。比如吃了那么多牛排，把福特号下水道堵了，疏通管道的费用算不算？

来源: cnnbull02 于 2026-03-15 17:35:23 [旧帖] [给我悄悄话] 本文已被阅读：次

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