Within a process flow in which multiple activities can be executed in parallel to optimize performance, follow-on dependent activities need to be synchronized.
在可以并行执行多个活动以优化性能的流程流中，需要使后继的相关活动同步。
2
PREFIX_MAP (5) : prefix to namespace mapping; application dependent Used in parallel routing scenarios.
PREFIX_MAP(5)：名称空间映射的前缀；取决于应用程序在并行路由场景中使用。
3
The incident, of course, also shows that while many people have become dependent on Web-based services like Gmail, many alternative forms of communication have cropped up that work in parallel.