Warning: file_put_contents(/www/wwwroot/ppbbu/laei.cn/cache/a8b4ba9e4ce8fa3604f7b8c0aaff5eb3.txt): failed to open stream: No space left on device in /www/wwwroot/ppbbu/laei.cn/index.php on line 58 principal idempotent element是什么意思,principal idempotent element的翻译,principal idempotent element音标、读音、用法和例句_按摩法牛津词典