Warning: file_put_contents(/www/wwwroot/ppbbbu/n94.cn/cache/13e65043aa4aa1e0770e82a9898e7db6.txt): failed to open stream: No space left on device in /www/wwwroot/ppbbbu/n94.cn/index.php on line 55 weak retraction是什么意思，weak retraction的翻译，weak retraction音标、读音、用法和例句_94生活常识网有道词典