但在实际上，要测量这些时间和距离，达到所需要的检测到纳秒级别差异的准确度，绝非易事。
But actually measuring those times and distances to the accuracy needed to detect nanosecond differences is no easy task.
GPS接收机的校正可以对这方面的误差做出解释，但尽管如此，GPS时钟信号只能保证准确度为100纳秒的级别。
GPS receivers make corrections to account for this, but nonetheless the clock signals are only guaranteed to be correct on the order of 100 nanoseconds.
采用大肚移液管，将标准溶液配制成整数级别的贮备液、中间液、使用液时，利用工作曲线计算测定值需要引入校正系数，利用该方法可简化操作，减少误差提高实验准确度、精密度。
The correction coefficient needs to be adopted to calculate the determinated value of work curve, it simplifies the operation, reduces error and enhances the accuracy and precision.
采用大肚移液管，将标准溶液配制成整数级别的贮备液、中间液、使用液时，利用工作曲线计算测定值需要引入校正系数，利用该方法可简化操作，减少误差提高实验准确度、精密度。
The correction coefficient needs to be adopted to calculate the determinated value of work curve, it simplifies the operation, reduces error and enhances the accuracy and precision.
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