In the process of drawing isogram the coordinates-origin method is used to control the cumulativeerrors of plotter and decrease them to the least.
为了控制绘图仪的累积误差，在绘制过程中，采用了坐标原点法，使累积误差减至最低限度。
2
The goal behind measuring n executions of task (n >= 1) is to make the cumulative execution time so large that all the time measurement errors I discuss above become insignificant.
度量 task 的 n 次执行的目的在于，让累计的执行时间足够大，从而减少前面讨论的所有时间度量误差的影响。
3
Sometimes feedback needs to be cumulative because not all errors can be corrected immediately.