There's a cathode, which is the positive electrode.

一个是阴极，它是阳性电极。

Once all the electrons have reached the positive electrode, the battery is considered discharged, meaning it's out of power.

一旦所有的电子都流向正极，电池则放电完毕，电量耗尽。

At the positive electrode, the hydroxide ions get used up.

在正极，氢氧根离子用完了。

Different chemical reactions occur at the battery's positive and negative electrodes.

电池的正极和负极会发生不同的化学反应。

A battery is made of a positive electrode called a cathode and a negative electrode called an anode.

电池由称为阴极的正极和称为阳极的负极组成。

In fact, if there's a depolarization wave that goes straight up, which is perpendicular to the positive and negative electrodes, then there'd be no deflection at all!

事实上，如果有一个除极波是竖直向上的，即完全垂直于正、负电极的话，那么心电图上就不会显示任何波形。

Now, if there's a dipole vector pointing toward the positive electrode, then the ECG tracing shows it as a positive deflection - the bigger the dipole, the bigger the deflection.

现在，如果有一个双极子的向量指向正电极，那么心电图上显示出来的就是一个正向的波形，双极子（正负电荷差值）越大，波形也就越大。

They also worry about cobalt and other ingredients used to make cathodes, the positive electrodes inside those batteries (though recent discoveries of new reserves have dampened those concerns as they relate to cobalt in particular).

他们还担心钴和其他用于制造阴极的成分，这些成分是电池内部的正极（尽管最近发现的新储量减轻了这些担忧， 尤其是与钴有关的担忧）。

But in 1886, German physicist Eugen Goldstein found that the tubes also emitted light from the positive electrode, basically, a ray headed in the opposite direction, which meant that there must also be a positive charge in matter.

但在 1886 年， 德国物理学家 Eugen Goldstein 发现， 这些管子也从正极发出光，基本上是一条相反方向的光线， 这意味着物质中一定也有正电荷。