Warning: file_put_contents(/www/wwwroot/zidian/oumou.cn/cache/5a984f5a3127749e322a2a1ea3c5dddb.txt): failed to open stream: No space left on device in /www/wwwroot/zidian/oumou.cn/index.php on line 58 covalent是什么意思，covalent的翻译，covalent音标、读音、用法和例句_歐米惠必应词典