A preferential model based on the expression to better support preferential strategies, especially segmental linear strategies.
设计出了基于表达式的优惠模型，加强对优惠策略的支持，尤其是分段式线性优惠。
A preferential model based on the expression to better support preferential strategies, especially segmental linear strategies.
设计出了基于表达式的优惠模型，加强对优惠策略的支持，尤其是分段式线性优惠。
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