阐述了我国目前主要采用的三种水价核算方法：边际成本法、计划定价法和成本核算法。
Briefly presents three mainly used methods for calculating water price: marginal cost method, planned price method and cost method.
分析发现，移动通信市场客户需求增长的高速性和移动通信业务本身的低边际成本是刺激移动运营商频繁推出业务套餐的主要动因。
The analysis indicates the high growth of the demand in the market and the low marginal cost of the business are the main factors for the operators to recommend suite business frequently.
本文中所用到的定价方法主要有边际成本定价方法。
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