Warning: file_put_contents(/www/wwwroot/zidian/diubi.cn/cache/4ed86959396951d169d8dc4bf15600c0.txt): failed to open stream: No space left on device in /www/wwwroot/zidian/diubi.cn/index.php on line 59 actual mechanical advantage是什么意思，actual mechanical advantage的翻译，actual mechanical advantage音标、读音、用法和例句_果味酸柯林斯词典