Warning: file_put_contents(/www/wwwroot/ppbbu/4cd.cn/cache/c06f52a0132ae0e6f0f0d10cb4efc10a.txt): failed to open stream: No space left on device in /www/wwwroot/ppbbu/4cd.cn/index.php on line 55 optic axis英英字典_optic axis剑桥英语解释_optic axis柯林斯英文解释_沉淀汉英词典
1. N the direction in a uniaxial crystal or one of the two directions in a biaxial crystal along which a ray of unpolarized light may pass without undergoing double refraction 光轴