Fatal error: Uncaught Error: Class "Database" not found in /home/u847227440/domains/wordstudy.cn/public_html/classes/WordQuery.php:17 Stack trace: #0 /home/u847227440/domains/wordstudy.cn/public_html/word_detail.php(7): WordQuery->__construct() #1 /home/u847227440/domains/wordstudy.cn/public_html/word.php(65): include('/home/u84722744...') #2 {main} thrown in /home/u847227440/domains/wordstudy.cn/public_html/classes/WordQuery.php on line 17