Warning: file_put_contents(/www/wwwroot/ppbbu/4cd.cn/cache/46ad9842cb386bcd8a72ad02684fd941.txt): failed to open stream: No space left on device in /www/wwwroot/ppbbu/4cd.cn/index.php on line 55 discrete-time是什么意思，discrete-time的翻译，discrete-time音标、读音、用法和例句_沉淀汉英词典