Warning: file_put_contents(/www/wwwroot/ppbbbu/n94.cn/cache/fcc0c976ae5303d080e4f2603044a34e.txt): failed to open stream: No space left on device in /www/wwwroot/ppbbbu/n94.cn/index.php on line 55 effortful retrieval是什么意思，effortful retrieval的翻译，effortful retrieval音标、读音、用法和例句_94生活常识网有道词典