focal
US /ˈfoʊ.kəl/
UK /ˈfoʊ.kəl/

1.
焦点的, 中心的
relating to the focus of a lens or mirror
:
•
The camera's focal length determines the field of view.
相机的焦距决定了视野。
•
Adjust the lens to achieve a clear focal point.
调整镜头以获得清晰的焦点。
焦点的, 中心的
relating to the focus of a lens or mirror