When an item is removed from the tree all elements above the said item are shifted left one place and the "total number of items" counter decremented.
当一个子项从树中删除时，其上面所有的元素对应的子项左移一个位置并“子项总数”减一。
2
If the particular day or date is a holiday, then the script does not increase the counter for the total working days.
如果此特别的日期是假期，则脚本不会增加总工作日数的计数。
3
This is particularly important when monitoring a counter over time, since the PdhCollectQueryData function returns a running total, rather than data per second.