A story must be expressed as story points before it's taken into sprint, these points are summed up to see when you planned enough for one sprint. You also need to points in order to maintain a velocity going from sprint to sprint.
It's fine to do some rough pre-estimating of backlog items though. This helps the product owner do some release planning and prioritizing ahead of a spring planning meeting. It also helps creating a release burn down chart (in combination with the team's velocity). The rough estimates may be re-estimated during a sprint planning meeting where there are usually discussed in full detail.
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一个故事在进入冲刺之前必须以故事点的形式表达，这些点会被总结出来，以了解您何时为一次冲刺计划得足够多。您还需要点以保持从一个冲刺到另一个冲刺的速度。
不过，对积压的项目进行一些粗略的预先估计是可以的。这有助于产品负责人在春季计划会议之前进行一些发布计划和优先级排序。它还有助于创建发布燃尽图（与团队的速度相结合）。
粗略的估计可能会在冲刺计划会议期间重新估计，通常会详细讨论。
A story must be expressed as story points before it's taken into sprint, these points are summed up to see when you planned enough for one sprint. You also need to points in order to maintain a velocity going from sprint to sprint.
It's fine to do some rough pre-estimating of backlog items though. This helps the product owner do some release planning and prioritizing ahead of a spring planning meeting. It also helps creating a release burn down chart (in combination with the team's velocity).
The rough estimates may be re-estimated during a sprint planning meeting where there are usually discussed in full detail.