Be very leery of the results of any performance measurement that does not involve a realistic program load over a long period of time.

对于那些没有包含什么实际的程序负荷，测试时间不够长的性能测试的结果，一定要非常当心。

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In digital measurement of period electric signals, uniform and synchronous sampling is a commonly used method with high performance and low computational complexity.

在周期电气信号的微机测量中普遍采用等间隔同步交流采样。

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