复数： heartbeats

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Physically , each of us has a unique heartbeat .

生理上，我们每个人的心跳都是独一无二的。

Electrocardiogram ( ecg ) . During an ecg sensors ( electrodes ) that can detect the electrical activity of your heart are attached to your chest and sometimes to your limbs . An ecg measures the timing and duration of each electrical phase in your heartbeat .

心电图（ecg）做心电图时，接在你的胸口和/或四肢的电极会探测心脏的电活动：它们会测量每次心搏的时限、相位等数据。

Your very voice is in my heartbeat , sweeter than despair .

你独特的嗓音铭刻在我爱的心跳里，比绝望还甜美。

It 's terrifying , but it 's over in a heartbeat .

这是令人害怕的，但最终将在心跳中结束。

Then it becomes a full functional heartbeat .

然后它将变成一个完整生效的心跳。