许多矿井都设有大型风扇，运转起来，就好像你站在的大风口处，此外，在墙上覆盖一层石灰石也能降低煤渣效应带来的危害。
Massive fans at many mines make it feel like you are standing in a wind tunnel. Coating the walls with limestone also can dampen the effects of coal dust.
当砂浆含有石灰石粉时，由于石灰石粉具有填充效应，能有效地改善砂浆的孔结构，降低其孔隙率。
When the sand grout contains limestone powder, the limestone powder can improve the pore structure and decrease the porosity of the sand grout because of its filling effect.
研究在石灰性烂田中冬种紫云英对土壤酶活性的效应。
Effect of winter sown Chinese vetch on soil enzyme activity in calcarious dirt soil is studied.
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