误差绝对值不能超过的数，称为误差范围。例如，π的近似值3.141的误差不超过0.001，0.001就是它的误差范围。
其实这个阶段的大多数评估都是高度主观的，并可通过较大的误差范围将其去除。
Most estimates in this phase are, in reality, highly subjective and can be off by wide margins.
这个公司说，激光的应用可以使误差范围减少几个百分点，通过附近的一个百分点，依次增加项目的内在收益率。
The company says the use of lidar can reduce the error margin by several percentage points, which in turn increases a project’s internal rate of return by around one percentage point.
诺依曼博士称，月球背面图像拼接工作所允许的位置误差范围大约在1到10公里（合0.62到6.2英里）之间。
The positional errors of image mosaics of the lunar far side have been between one and ten kilometres (about 0.62 to 6.2 miles), Neumann said.
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