该方法减少了未知状态变量的数量，从而简化了循环判断过程和便于程序设计。
It reduces the amount of unknown variables and simplifies the recycling process of judgement, and it is easy to be programmed.
该方法减少了未知状态变量的数量，从而简化了循环判断过程和便于程序设计。
It reduces the amount of unknown variables and simplifies the recycling process of judgement, and it is easy to be programmed.
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