求翻译：步骤四：对于不同对象 的极值点数目可能不同，那么其极值点也不是完全一一对应的，故 和 也不可能相等。为了研究两个对象间的相异性，可以用距离 来测量相异性：是什么意思？

Step Four: the number of extreme points may be different in different objects, then its extreme points is not completely one to one, it can not be equal. In order to study the dissimilarity between the two objects, using distance to measure dissimilarity:

Step 4: for the different objects of value may be different from that point of the pole is also not completely correct, and 11 and also cannot be equal. In order to study between two objects, and the opposite sex can be used to measure distance from the opposite sex.

Step four: Regarding different object extreme point number possible different, then its extreme point is not completely 11 correspondences, therefore with not impossible equal.In order to study the diversities between two objects, may use to be away from surveys the diversity:

Step four: extremal points may be different for different objects, then its extreme points are not completely correspond to the one by one, and cannot be equal. To study the differences between two objects, distances can be used to measure the dissimilarity:

正在翻译，请等待...