心音是人体最重要的生理信号之一，心音听诊的历史已有180多年。

ABSTRACT Heart sound is one of the most important physiological signal in human body, the history of cardiac auscultation is more than 180 years.

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心音是人体最重要的生理信号之一，心音听诊的历史已有180多年。

Heart sound is one of the most important physiological signal in human body, the history of cardiac auscultation is more than 180 years.

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她把听诊器放入白大褂的左口袋中——她一向放它的地方。

She put the stethoscope in the left pocket of her lab coat--the same place she always left it.

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