cost approach短语¹⁴⁴⁹⁷²⁺² 基本例句 经成本计算法; 成本处理 This paper reports an explosive puffing method which has been studied as a low cost approach to improve solubility of recovered pig hair for its efficient utilization. 本文报导了通过爆发性膨胀增加猪毛溶解度的方法，从而使得保毛脱毛法所回收的猪毛能够得到更有效的利用。 cnki