在迭代开发的早期，产品所有者可以对发行版计划安排重新划分优先级，这样开发团队就能够知道接下来要开发的内容。
At the start of the iteration, the product owner can re-prioritize the release backlog so the development team knows the items it needs to work on next.
在产品计划安排和发行版计划安排中，开发团队将评估每个用户描述并为其分配描述点。
In the product backlog and release backlogs, the development team estimates and assigns story points to each user story.
图4同时也表明，开发团队无法在发行版计划安排中完成所有用户描述。
What Figure 4 also communicates is that the development team cannot complete all the user stories in the release backlog.
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