EKG测量你孩子的心脏的电活动。
An EKG measures the electrical activity of your child's heart.
因此，对心脏电活动的研究具有非常重要的意义。
So, it is very important to understand the mechanism of heart electric activities.
动物或人体试验是探索体表电位与心脏电活动之间相互关系的方法之一。
It is one of the methods to investigate them that animal or human bodies experiment.
动物或人体试验是探索体表电位与心脏电活动之间相互关系的方法之一。
It is one of the methods to investigate them that animal or human bodies experiment.
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