... 两地间基本航空运价 basic point-to-point air fares 高价单位 unit of higher order 计价单位 charge unit; unit of account ...
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The results show that in order to obtain higher exergy efficiency number of transfer unit(NTU)and capacitance ratio should be selected carefully for they have optimum values.
指出为取得较高的（火用）效率，传热单元数和水当量比应仔细选择，它们有一最佳值。
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