Change itself isn't bad, but uncontrolled change — where the impact is not measured before it happens — can be detrimental to the success of a project.
变化本身不是坏事,但是不受控制的变化(影响在发生之前无法测量)对于项目的成功则是有害的。
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If we want to change our implementation resulting in the possibility of having new account Numbers created with leading zeros, it could be detrimental to some consumers.