In the first instance, to borrow from Flannery, it is like miscounting by a dollar when counting to a thousand; in the second it is more like miscounting by a dollar when you have only two dollars to count.
借用弗兰纲纳里的话来,在第一种情况下,就像是1000美元里少1美元;而在第二种情况下,就像是仅有的2美元里少了1美元。