词典释义：
关税结构
A water tariff structure with step-wise increase or decrease of the price per unit water from one block to the next.
一种水价结构，水的单价从一个水量段到下一个水量段逐步增加或者减少。
Various methods of designing water tariff structure were studied and their advantages and disadvantages were analyzed.
研究了水费结构的设计方法，并对多种水费结构的优缺点进行了分析；
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