a knowledge refinement process 逐步求精的过程
Design is a complex process of problem solving and knowledge refinement.
设计是一个复杂的问题求解和逐步求精的过程。
With the deeper knowledge of ultra fine grain steel, the process of refinement has became one of the main methods to increase mechanical properties of steel availably nowadays.
随着对超细晶粒钢性能了解的逐渐深入，组织细化技术已经成为当今钢铁行业有效提高钢铁机械性能的重要方法之一。
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