Warning: file_put_contents(/www/wwwroot/zidian/diubi.cn/cache/9bcb908a3a23d2255382fd7488e4ea5a.txt): failed to open stream: No space left on device in /www/wwwroot/zidian/diubi.cn/index.php on line 59 concavedownward是什么意思，concavedownward的翻译，concavedownward音标、读音、用法和例句_果味酸柯林斯词典