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Velocity in Scrum is a measure of the amount of work a Team can tackle during a single Sprint and is the key metric in Scrum. Velocity is calculated at the end of the Sprint by totaling the Points for all fully completed User Stories. (速度是一个团队在一次冲刺中可以完成的工作量的度量，也是Scrum中的关键度量标准。在冲刺结束时，通过对所有完全完成的用户故事的点进行合计来计算速度。)

Scrum is a framework within which people can address complex adaptive problems, while productively and creatively delivering products of the highest possible value. Whilst it is lightweight and simple to understand it is difficult to implement and hard to master. This article tell you why?(Scrum是一个框架，人们可以在其中解决复杂的适应性问题，同时富有成效和创造性地交付具有最高价值的产品。虽然它是轻量级的，易于理解，但很难实现，也很难掌握。这篇文章告诉你为什么？)

Scrum has not been immune to controversy, and its history of invention is a topic of frequent debate. Some professionals believe that Jeff Sutherland, John Scumniotales, and Jeff McKenna invented Scrum in 1993. And then there are others who vouch for Hirotaka Takeuchi and Ikujiro Nonaka as inventing Scrum in 1986. (Scrum并没有不受争议，它的发明历史是一个经常争论的话题。一些专业人士认为Jeff Sutherland、John Scumniotales和Jeff McKenna于1993年发明了Scrum。还有其他一些人也许相信, 在1986年Hirotaka Takeuchi和Ikujiro Nonaka发明了Scrum。)

Less known than the process of Scrum and probably under-highlighted, but therefore not less important, are the 5 core Scrum Values upon which the framework is based: Commitment – Focus – Openness – Respect – Courage. These values relate to the ethics of Scrum, thereby -from a social point of view- turning Scrum into a value system. (与scrum的过程相比，人们对scrum知之甚少，而且可能低估了这一点，但同样重要的是，该框架所基于的5个核心scrum价值观：承诺——关注——开放——尊重——勇气。这些价值观与Scrum的伦理有关，因此从社会的角度来看，将Scrum转变为一个价值体系。)

This article covers all the key concept of Scrum framework that make you easily be recalled and apply anytime from your mind as systematic knowledge structure (本文涵盖了 scrum 框架的所有关键概念, 使您可以轻松地被召回, 并从您的头脑中随时作为系统的知识结构应用)

(英文版) (日本語版) 什么是Scrum的三大支柱？ SCRUM使用经验方法（或有时称为经验主义）以适应客户不断变化的需求。经验主义是根据实际经历的内容做出决策的行为。经验方法意味着以事实为基础，以经验为基础，以证据为基础的方式开展工作，特别是，进展是基于对现实的观察，而不是基于大量前期要求的虚构计划。

This article gives you a general overview of Scrum Framework in a nutshell, which covers all the key concept of scrum and Agile development including scrum roles, artifacts, ceremonies, values and rules. (本文简单介绍了 scrum 框架的一般概述, 其中涵盖了 scrum 和敏捷开发的所有关键概念, 包括 scrum 角色、工件、事件、核心价值和规则。)