They work because certain materials, such as bismuth telluride, generate an electrical potential difference within themselves if one part is hotter than another.

它们之所以能起作用是因为某些材料，比如碲化铋，如果其中一部分比另一部分热，内部就会产生电位差。

This creates a difference in electrical potential, which in turn produces a voltage.

这会产生电位差， 从而产生电压。

The second type are voltage-gated channels, which are mostly found in muscle and nerve cells and are primarily controlled by changes in the electrical membrane potential.

第二种是电压门控离子通道，大多分布在肌肉和神经细胞中，主要由膜电位的改变来调控。

This is the reaction's electrical potential, but to its friends, it's known simply as voltage.

这是反应的电势， 但对于它的朋友来说， 它被简单地称为电压。

The graphs show the heart's OVERALL electrical potential, or voltage, as it changes over time during a cardiac cycle.

这些图形显示了心脏在一个心动周期内随时间变化的总电势或电压。

Now I gotta point out here that the electrical potential of a redox reaction is related to its equilibrium constant.

现在我要在这里指出， 氧化还原反应的电势与其平衡常数有关。

And as I mentioned earlier, voltage is really just a way of expressing the electrical potential of each half reaction.

正如我之前提到的， 电压实际上只是一种表达每个半反应电位的方式。

Voltage is a measure of electrical potential energy, a type of energy related to an object's condition (and not its motion).

电压是电势能的量度， 是一种与物体状况（而非其运动）相关的能量。

And the electrical potential for the whole reaction, called the standard cell potential, is just the sum of the standard potentials of both half reactions.

整个反应的电势称为标准电池电势，只是两个半反应的标准电势之和。

Similarly, lead III measures electrical potential between the left arm – negative - and the left leg –positive, looking at the heart from an INFERIOR RIGHT angle.

同样，III导联监测左臂（负极）和左腿（正极）之间的电位，从右下角监测心脏。

Now, the interesting thing is that in addition to the pacemaker cells in the SA node, cells in the AV node, Bundle of His, and the Purkinje fibers, all have the ability to generate an electrical potential.

好了，有趣的是除窦房结起搏细胞以外，房室结、希氏束以及浦肯野纤维中的细胞都有形成电势的能力。

Scientists say that the battery is a source of electromotive force, because it gets charge to move – but it’s not really providing a force, but rather a difference in electrical potential.

科学家们说， 电池是电动势的来源， 因为它需要充电才能移动——但它并不是真正提供力， 而是提供电势差。

Scientists say that the battery is a source of electromotive force, because it gets charge to move – but it's not really providing a force, but rather a difference in electrical potential.

科学家们说，电池是电动势的来源，因为它使电荷移动——但它实际上并不提供力，而是提供电位差。

She and her colleagues mimicked the design of simple but long-lasting Edison batteries, in which an electrolyte solution carries ions between positively charged nickel plates and negatively charged iron ones, creating an electrical potential that produces voltage.

她和她的同事们模仿了简单但持久耐用的爱迪生电池的设计，其中电解质溶液在带正电的镍板和带负电的铁板之间携带离子，从而产生产生电压的电势。