调节焦距 meaning in Chinese

bring into focus
focalise
focalize

In camera, the lens must be focused on the object to be photographed .
照相机内的镜头必须对准要拍照的物体调节焦距。
His eyes were so tired that he had difficulty focusing them
他的眼睛累了,调节焦距困难。
The variable - focus liquid microlens based on electrowetting on dielectric ( ewod ) , which has the outstanding advantages of simple structures , low power dissipation , easily tunable of focal length , etc . , is most attractive
在提出的各种新型的可变焦微透镜技术中，基于介质上电润湿的微流体透镜由于其结构简单、功耗低、调节焦距方便等众多突出的优点而被人们所重视。