有人建议，洗澡应该是“对水的尝试”至少一小时，让母亲判断其有效性。
It has been suggested that the bath be used in a "trial of water" for at least one hour, allowing the mother to judge its effectiveness.
工程实践证明了该矿突水防治方案的可行性和有效性。
The practice shows that the mine's control plan of the water irruption is feasible and effective.
研究结果表明：高聚物不仅能提高土壤的持水力和增加土壤水对植物的有效性，而且还能抑制土壤水的蒸发。
The result shows that the high polymers VAM and PHM can not only enhance the water retention ability and the available water content, but also prevent the evaporation from the surface soil.
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