Warning: file_put_contents(/www/wwwroot/zidian/diubi.cn/cache/1387030665674fc76be1bba40822dbd0.txt): failed to open stream: No space left on device in /www/wwwroot/zidian/diubi.cn/index.php on line 59 maximization of total utility是什么意思，maximization of total utility的翻译，maximization of total utility音标、读音、用法和例句_果味酸柯林斯词典