Warning: file_put_contents(/home/www/wwwroot/tjuzi.com/cache/78aa9ccb768e3aa0eae3dc27d6a716ff.txt): failed to open stream: No space left on device in /home/www/wwwroot/tjuzi.com/index.php on line 55 null set of class是什么意思，null set of class的翻译，null set of class音标、读音、用法和例句_橘子化妆朗文词典
Also, many times member variables of a class that point to other classes simply need to be set to null at the appropriate time. 此外，您常常需要在适当的时候将指向其他类的类成员变量设置为 null。