2.供求關系 Supply-demand relation
3.供大於求 Supply exceeding demand
4.資源的稀缺性 Resources scarcity
5.考慮邊際效益 Considers the marginal benefit
6.基尼系數 Gini's coefficient
7.質量體系認證 Quality system authentication
8.上級 Higher authority
9.下級 Subordinate,lower level ,junior