病人多呈贫血貌，体检有心音低钝、心律失常等异常体征；

The patients had mostly anemic appearance and there were cardiac sound low and arrhythmia.

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当医生知道什么是正常心音图形的时候，就可以将患者心音与正常心音相比较，并在计算机屏幕上或者打印件上很容易地看出异常。

When doctors know what healthy waves look like, they can compare their patients' heart sounds to the healthy waves and easily see aberrations by simply looking at a computer screen or printout.

youdao

当医生知道什么是正常心音图形的时候，就可以将患者心音与正常心音相比较，并在计算机屏幕上或者打印件上很容易地看出异常。

When doctors know what healthy waves look like, they can compare their patients' heart sounds to the healthy waves and easily see aberrations by simply looking at a computer screen or printout.

youdao