Warning: file_put_contents(/www/wwwroot/ppbbu/73904.com/cache/8a0ecc73470ba5f178a176f826d5e5f7.txt): failed to open stream: No space left on device in /www/wwwroot/ppbbu/73904.com/index.php on line 55 approximation in geometric optics是什么意思，approximation in geometric optics的翻译，approximation in geometric optics音标、读音、用法和例句_骑士汉英词典