marginal efficiency

The primary causes of the aggregate shortage are the large population, and the low developing level of society and economy, and the marginal efficiency of educational capital, and the lower repay to educational invest.

总量性短缺的成因主要是我国人口多、经济发展水平低，教育投资资本边际效率递减趋势、教育投资预期收益相对偏低等；

The contribution of the resources consumption will be lower down with the development of economy. The decreasing rate is proportion to the economic level. It is consistent with the law of diminishing marginal efficiency of capital.

随着经济的发展，资源消耗对中国经济增长的贡献作用逐渐降低，下降速度与经济发展水平呈正比，这在某种程度上与资本的边际效率递减规律相吻合。

Due to urban land use structure and land use patterns, pure technical efficiency and scale efficiency regressed, and the marginal efficiency of land use was low.

由于土地利用结构和方式不够合理，纯技术效率和规模效率均出现退步，土地利用边际效率较低。