内窗层

例句：

1. 1. The engineer designed a new internal window layer for the building.
   工程师为大楼设计了一种新的内部窗户层。
2. 2. The construction crew installed the internal window layer before the walls were finished.
   施工队在墙壁完工前安装了内部窗户层。
3. 3. The internal window layer is essential for maintaining air quality in the room.
   内部窗户层对于保持房间空气质量至关重要。