How to prevent the set of a get variable?
如何防止一个变量的设置？
How do you get variable substitution to do exactly what you want?
如何才能进行你想要的变量替换？
To get the title of the book, simply get the title member variable.
要得到图书的书名，只需得到title成员变量。
How to get value of variable from other class?
如何从其他类变量的价值吗？
How to get value of variable from other class?
如何从其他类变量的价值吗？
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