以下为句子列表：
英文: A reserved area of memory where the CPU automatically saves the program counter and the contents of working registers when a program interrupt occurs.
中文: 内存中的一块留用存储区,当程序中断产生时,CPU自动在其中保存程序计数器和工作寄存器的内容。
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英文: The program counter is a latch with the extra ability to increment by 1 when told to do so,and also to reset to zero when told to do so.
中文: 程序计数器也是个锁存，但还能够在指示下递增1，还能够在指示下复位为0。
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