window frame

例句：

1. 1.The window frame is made of wood and has a beautiful design.
   这个窗户框架是用木头做的，设计很美观。
2. 2.The new window frame is more energy-efficient than the old one.
   新的窗户框架比旧的更节能。
3. 3.The window frame was damaged during the storm, so we need to replace it.
   暴风雨损坏了窗户框架，所以我们需要更换它。