clean名词cleannessn.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
水利万物而不争,
而万物莫能与之争。
