For example, if the third value in chain 3 matches the second value in chain 7, the two chains will cover almost the same sequence of values, but their final values will not be the same.
例如，如果链3的第三个值和链7的第二个值重合了，那么这两条链将覆盖几乎同样的值，但他们的终点值却不相同。