Warning: file_put_contents(/www/wwwroot/zidian/oumou.cn/cache/2468521f5f9313189bfae0ebd104cda6.txt): failed to open stream: No space left on device in /www/wwwroot/zidian/oumou.cn/index.php on line 58 arithmetical progression是什么意思，arithmetical progression的翻译，arithmetical progression音标、读音、用法和例句_欧米惠必应词典