economic life of tractor  拖拉机经济寿命

economic value of ecosystem service function  生态系统服务功能价值

economic value of electricity  电力价值

economic value of the grasslands  草地产值

Economic Value of Water  水经济价值

Evaluation of economic value  经济价值评估

the economic life of the bridge  桥梁经济寿命

the economic value of hospital  医院经济价值

Characteristic value of of natural nodule  大豆自然结瘤性状C值

keeping and increasing of value of assets  资产保值增值

quantity of value of the goods  商品价值量

return of value of agriculture  价值归真

theory of life value  生命价值论

theory of value of goods  价值理论

Traceability of Value of a Quantity  量值溯源性; 量值溯源

Value of life  生命价值; 生命价值观; 人生价值

quality of life of college students  大学生生命质量

the quality of life of residents  居民生活质量

a reform of economic system  经济体制改革