service cost短语¹⁴⁴⁹⁷²⁺² 基本例句 劳务成本,劳务费用 However, cost sharing theory has its limitations because of the smeared boundaries of service/span> cost in education service, fuzzy vectors, difficult calculations in service cost and rate of return. 但因教育服务成本边界模糊、构成模糊、计量困难和各方高等教育受益率测算困难,高等教育成本分担理论具有很大的局限性。 cnki