例句與造句

1. a plastic membrane serves as selective diffusion barrier .
   一層塑料薄膜起著選擇性滲透屏障的作用。
2. development of diffusion barrier for cu interconnection in ulsi
   互連擴散阻擋層的研究進展
3. It's difficult to find diffusion barriers in a sentence. 用diffusion barriers造句挺難的