The traditional concept for billing and metering SaaS applications is a monthly fixed cost; in some cases, depending on the amount of data or number of "seats," the billing and pricing are optimized.
对SaaS应用程序计费和计量的传统观念是每月固定费用；有些情况下，根据数据量或“座位数”，对计费和定价进行了优化。
On the basis of the comparison of traditional concepts of educational costs, the author also addresses an important concept here: education information cost.
该部分还在对比传统教育成本概念的基础上，提出了一个重要概念：教育信息成本。
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