可變焦距的
Pancratic \Pan*crat"ic\, a. [Gr. ? all-powerful.] (Opt.) Having all or many degrees of power; having a great range of power; -- said of an eyepiece made adjustable so as to give a varying magnifying power. Pancratic \Pan*crat"ic\, Pancratical \Pan*crat"ic*al\, a. [See {Pancratium}.] Of or pertaining to the pancratium; athletic. --Sir T. Browne