reserve accumulator

• 保留累加器

reserve accumulator的用法和样例：

例句

1. Accumulator and index register can be accessed by the programmer.
   程序员可以对累加器和变址寄存器进行存取。
2. At any point, results can be extracted from the accumulator set.
   任何时间点都可以从累加器集获取相应结果。