可以实现内存管理，采用先来先服务算法，在淘汰一页时，只将该页在页表中修改状态位。而不再判断它是否被改写过，也不将它写回到辅存。-Memory management can be achieved using a first-come first-serve algorithm, in one out of only the page in the page table modify status bits. Rather than to judge whether it had been rewritten, not to write it back to Des depositors.