As we click around in the application, new events will be pushed onto the top of the stack, and the pointer will identify the last element added.
当我们在应用程序中单击的时候，新的事件将被压入堆栈顶部，指针指向最后添加的元素。
When an exit address is encountered, the current active function has returned and the top element on the stack is discarded.
在碰到退出函数时，当前的活动函数就会返回，并释放栈顶元素。
Stack is empty — error occurs at or below top-level element.
堆栈为空————顶层元素或其下层元素发生了错误。
The source for the top-most element on the event route stack at which two logical trees diverge.
在事件路由堆叠中，新增开始分枝成两个逻辑树状结构的最上层项目。
The source for the top-most element on the event route stack at which two logical trees diverge.
在事件路由堆叠中，新增开始分枝成两个逻辑树状结构的最上层项目。
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