例如，对于一个单位球面，仅用x, y, z计算就可以。
For example, if this was the unit sphere then I would just put x, y, z.
有时，他们写出服役对他们的意义，怀念一个倒下的朋友，对于回家的渴望，或是吹嘘各自的单位。
Other times they spelled out what their service meant to them, honored a fallen friend, pined for home, or bragged about their units.
使用描述点而不是时间单位的另一个原因是，对于不同的人来说，所需的时间是不同的。
Another reason to use story points versus units of time is that the ideal time from one person to another can vary.
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