The standard limit on the precision with which a quantum measurement can be carried out is due to the statistical error associated with counting discrete particles rather than continuous quantities.
量子测量中精度的标准极限，源于与可计数离散粒子，而不是连续量相关的统计误差。
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As you review the statistical data generated, keep in mind that time.time 's accuracy is platform dependent and may in some cases have no better than one second of precision.
The precision prediction with weighted method in the new urban is 6% more than that with statistical method. It is much better in the old town, more than 15%.