economy run汽车节油行驶竞赛economyn.经济；节约adj.经济的；廉价的economy equilibrium经济均衡economy convergence经济收敛economy development经济发展Economy Cooperation关税同盟economy in the West西部经济economy of forestry林业经济economy contracting经济紧缩economy globalizing经济全球化economy of research研究经济学economy reformation经济改革