clean名词：cleanness

n.利落，清楚;清洁；洁白;改（完）善；改良

例句：

Cleanness, undercooling and grain size of low carbon steel

低碳钢纯净度、过冷度与晶粒度的关系

Production with Cleanness, Increasing in Beneficial Result

清洁生产增加效益