说明：  这个实用程序将允许您探索真实的应用程序如何响应各种页面替换方案。这个程序使用各种分页方案来模拟内存系统的行为。
(this program will allow you to explore how real applications respond to a variety of page replacement schemes. This program is simulates the behaviour of a memory system using a variety of paging schemes.)