mandatory (adj.)是什么意思，mandatory (adj.)的翻译，mandatory (adj.)音标、读音、用法和例句

Warning: file_put_contents(): Only 0 of 6021 bytes written, possibly out of free disk space in /home/www/wwwroot/zidian/001308.com/index.php on line 55
mandatory (adj.)是什么意思，mandatory (adj.)的翻译，mandatory (adj.)音标、读音、用法和例句_零食美味英文词典