aperture of frontal sinus

例句：

1. 1.The scientist measured the aperture of the lens to determine its focal length.
   科学家测量了镜头的开口来测定其焦距。
2. 2.The engineer designed a new aperture for the camera to improve its resolution.
   工程师为相机设计了一个新的开口以改善其分辨率。
3. 3. The hole in the wall allowed people to enter and exit the building.
   墙上的洞让人们可以进入和离开大楼。