说明：  动态重定位分区分配算法与动态分区分配算法基本上相同,差别仅在于:在这种分配算法中,增加了紧凑的功能,通常,在找不到足够大的空闲分区来满足用户需求时进行紧凑
(The dynamic relocation partition allocation algorithm is basically the same as the dynamic partition allocation algorithm, except that: in this allocation algorithm, compact functions are added, usually compact when there is no free partition large enough to meet user needs)