短语词组短语optic elastic axis 光弹性轴optic c axis 光轴optic -axis interference figures 光轴干涉图optic axis of crystal 晶体光轴length of optic axis 眼轴长度thermally induced optic axis 热感应光线轴primary optic axis 第一光轴;第一对光轴 返回 optic axis