说明：  优先比算法常用于批处理系统中作为作业调度算法，也作为多种操作系统的进程调度算法，更可用于实时系统中，以实现对实时作业的实时响应。
(Priority than the algorithms commonly used in a batch system as a job scheduling algorithm, but also as a variety of operating system process scheduling algorithm, but also can be used for real-time systems, in order to achieve real-time operation real-time response.)