cost-free

Long-term cost-free using nature resource has engendered severe environment polution and resource damage.

由于长期以来人类一直在无偿地使用环境，无节制地滥用资源，造成了严重环境污染和资源破坏。

The result of inherent motivation shows the investment depending on cash flow in larger size firm is caused by information asymmetric theory, while in smaller size firm that is caused by free cash flow agency cost theory.

动因检验的结果表明，大规模公司投资依赖于现金流量源于信息不对称理论，小规模公司投资依赖于现金流量源于自由现金流量的代理成本理论。

As compared with ordinary small hollow concrete block: its density lowers 20%~ 30%, its cost of raw materials reduces 7~ 10 Yuan RMB/ m3, 6~ 10 Yuan RMB/ m3 of tax can be free.

该砌块和普通混凝土小型空心砌块相比：块体密度下降20%～30%，原材料成本降低7～10元／m3，可获6～10元／m3的免税。