special function的用法和樣例：
例句
- An area of the stack associated with a particular function call.
一個關聯特殊函數調用的堆棧區域。 - The destructor is a special member function that can be used to do whatever resource deallocation is needed.It serves as the complement to the constructors of the class.
析構函數就是這樣的一個特殊函數，它可以完成所需的資源回收，作為類構造函數的補充。
