interface extension

例句：

1. 1. The computer has a front and back interface.
   这台电脑有前面板和后面板。
2. 2.The new software interface is much easier to use than the old one.
   这款新软件的界面比旧版本更易用。
3. 3. The scientist used a microscope to observe the interface between two materials.
   科学家使用显微镜观察两种材料之间的界面。