污点
2009年美网半决赛是小威光芒的职业生涯中的最大污点(Stain),而过去12个月中一经在九泉转了一圈的小威想要尽快忘记当时(Then)的一幕,人生要在平淡之中求进步,又在艰苦中见其光辉;也显得...
染色剂
本公司供应供应染色剂(Stains),可出样品。品质保证,欢
污染
专利技术背景漂白剂在许多清洁应用中被使用,以便致使被污染(stain)的材料成为无色的。典型地,漂白剂是通过氧化特定的污染分子的共轭的或不稳定的部分起作用的氧化剂。
A stain is a discoloration that can be clearly distinguished from the surface, material, or medium it is found upon. They are caused by the chemical or physical interaction of two dissimilar materials. Staining is used for biochemical research, metal staining, and art (e.g., wood staining, stained glass).