Exactly. If they had the choice to opt out, they would opt out in a heartbeat.

没错。如果以选择退课，那能会马上退选这门课。

Horror increases your heartbeat, makes you feel more alive.

恐怖会使你心跳加速 让你感觉更有活力。

Well, your contraption has changed my heartbeat. It changed my rhythm. I can't play.

而你的设备改变了我的心跳。它改变了我的节奏，我不能拉琴了。

This part of the heartbeat, when blood is filling the relaxed ventricles is called diastole.

血液充满舒张的心室的这个时期被称为舒张期。

Vocal performances impose set breathing patterns, which regulate and synchronize heartbeats.

声乐表演控制呼方式，呼方式则控制心跳。

The nervous system regulates your heartbeat and digestion.

神经系统调节你的心跳消化。

D is for Defibrillation, which is about delivering a shock to restart the heartbeat.

D代表除颤，这是通过提供电击以重新启动心跳。

An LED display attached to the hand will show the patient's data, like a heartbeat.

连接在手上的LED显示屏将显示病人的数据，比如心跳。

Each heartbeat can be broken into systole and diastole.

每次心跳都被分解为收缩舒张。

A fever is a medical condition which increases your body temperature and heartbeat.

发烧是一种会升高体加心跳的医学症状。

A human heartbeat is regulated by electrical charges that signal muscles to contract and release.

人类的心跳是由电荷调节的，它向肌肉发出收缩释放的信号。

Check to see if the victim is breathing and has a heartbeat.

检查受害者是否有呼心跳。

But it's relentless frustrating tourists in places where tourism is the heartbeat of the economy.

但在那些以旅游业为经济支柱的地方，这种情况让游客感到无尽的沮丧。

My heartbeat has accelerated, and my cheeks are heating up again.

我的心跳加速，我的脸再次升。

We say something happens in the blink of an eye or in a heartbeat.

比如" 眨眼间或心跳的瞬间发生某事（in the blink of an eye or in a heartbeat）" 。

One of them, for example, is they can detect an irregular heartbeat.

例如，其中一个就是它能检测出不正常的心率。

They can also tell you if your heartbeat is too low.

如果你的心率太低，它还会向你发出提醒。

They'd likely betray you in a heartbeat.

很能会瞬间背叛你。

If you stay calm, the tension will disappear in a heartbeat.

只要你保持冷静，紧张气氛就会瞬间消失。

The name comes from the Italian word for heartbeats.

这个名字来自意大利语，意思是心跳。