After events from the queue are consumed, they are put into a holding area where they build a set of related events.
来自队列的事件被消费后，它们被放置进一个容纳区域中，并在那里构建一组相关事件。
3
An area of memory that contains a last-in-first-out queue of storage for parameters, automatic variables, return addresses, and other information that must be maintained across function calls.