这段代码正确地报告了完全数，但是由于反向测试的原因，代码运行得非常慢，因为我需要检查大量数字。
This code correctly reports perfect Numbers, but it runs very slowly for the negative test because I'm checking so many Numbers.
目前常用的硬件仿真测试平台存在很多不足之处，而全数字仿真平台很好地解决了这个问题。
The currently used hardware simulation te sting platform has lots of deficiency, while the full digital simulation platform can solve the problems successfully.
全数字PWM 交流主轴驱动系统的关键在于如何实时地得到PWM 开关信号。
The key of the fully digital PWM speed regulation system is how to get the PWM signals on-line.
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