Warning: file_put_contents(/www/wwwroot/ppbbu/62383.com/cache/13ee5ff9d6892e33ee518e2522bcee4a.txt): failed to open stream: No space left on device in /www/wwwroot/ppbbu/62383.com/index.php on line 55 constant of proportionality是什么意思，constant of proportionality的翻译，constant of proportionality音标、读音、用法和例句_流逝汉英词典