水的净化过程包括去除杂质和污染物。

The ___refinement of water involves removing impurities and contaminants.

经过多次改进，这个设计现在更加简洁高效了。

After many ___refinements, the design is now much more streamlined and efficient.

他的举止优雅，显示出良好的教养。

His manners display a remarkable level of ___refinement.