A frame function can dynamically allocate stack space and can employ a frame pointer.
帧函数可以动态分配堆栈空间并采用帧指针。
The stack pointer tells you where the end of your current stack frame is.
堆栈指针给出的是当前堆栈框架的结束位置。
The back chain pointer points to the back chain pointer of the previous stack frame.
回链指针指向前一个堆栈框架的回链指针。
The scene is the master frame so it has no parent (the NULL pointer).
此场景是主画面对象，没有祖先。
The scene is the master frame so it has no parent (the NULL pointer).
此场景是主画面对象，没有祖先。
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