the surface enrich- ment

• 表面富集

the surface enrich- ment的用法和样例：

例句

1. The obtained polysilane -polyacrylate gradient films showed no macro-interface with the silicone content reducing gradually from the top surface to the bottom one.
   然后结构渐变成另一面富集有机硅聚合物的梯度膜。