Previous attempts to use cardiac muscle power to run pacemakers relied on piezoelectric materials.

之前使心脏肌肉能量运行起搏器的尝试是依赖于压电材料。

To do all this, though, you need a device called a transducer.

但完成该过程，你不能缺少台叫做‘压电式换能器'的设备。

" … supplied with current from the Grand Canyon hydro-electric station."

“… … 高压电是由大峡谷水电站供应的。”

At the next station the cow is subjected to high-voltage electrical stimulation.

在下站，牛会受到高压电刺激。

Take high-tension power lines, for example.

以高压电线为例。

To make a transducer by painstakingly micro-machining a brittle block of ceramic material can take many hours of work, though.

压电式换能器需要到陶瓷材料，而精密地加精细的陶瓷材料就要耗费几个小时的作时间。

And we thought, OK, let's combine it with a piezoelectric material.

我们想，好吧，让我们把它和压电材料结合起来。

The music is also made with the piezo material.

音乐也是压电材料制作的。

When squeezed, a piezoelectric crystal generates a current.

当压电晶体被挤压时，会产生电流。

His stomach was screeching and his nerves dancing with high voltages.

他的肚子在叫，神经像通了高压电样跳个不停。

No, if you bought your house near to an existing pylon, bad luck.

不，如果你买的房子靠近现有的高压电线塔，那只能自认倒霉。

10. The power keeps fusing in your apartment when you turn on high voltage appliances.

10. 当您打开高压电器时，您公寓的电源直熔断。

Transducers are made from arrays of tiny piezoelectric structures that convert electrical signals into ultrasound waves by vibrating at an appropriate frequency.

压电式换能器是由具有‘压电'效应的系列敏感元件机构组成。敏感元件机构通过‘定频'震荡将电信号转换成超声波。

But some crystalline materials don't possess a center of symmetry, making them candidates for piezoelectricity.

然而， 某些晶体材料缺乏对称中心，这使得它们成为压电效应的候选材料。

This means piezo materials can be employed both as actuators and as sensors.

这意味着压电材料可以既作执行器又作传感器。

For a simpler example, take a look outside at just about any high voltage power line.

举个更简单的例子，看看外面的任何高压电源线。

Piezoelectric materials turn mechanical stress like pressure, sound waves, and other vibrations into electricity, and vice versa.

压电材料能将压力、声波及其他振动等机械应力转化为电能，反之亦然。

In most non-piezoelectric crystalline materials, the atoms in their unit cells are distributed symmetrically around a central point.

在大多数非压电晶体材料中，其晶胞内的原子围绕中心点对称分布。

Dr Zhang and Dr Yang speculated that they could improve matters by arranging for their piezoelectric composites to be more dramatically deformed.

张浩和杨斌推测，他们可以通过让压电复合材料更加变形的方法改善这个问题。

Let's look at quartz, a piezoelectric material made of silicon and oxygen.

让我们来看看石英，种由硅和氧构成的压电材料。