One of the electrodes could be heated, which would cause it to emit electrons – a process called thermionic emission.

其中一个电极可以加热，然后发射电子——这个过程称为" 热电子发射" 。

The second type of radioactive decay is beta decay, which simply emits electrons.

第二种类型的放射性衰变是 β 衰变， 它只是发射电子。

Even though the thorium emits an electron we don't use the usual symbol for electrons.

即使钍发射电子， 我们也不使用通常的电子符号。

And to compensate for the change in charge, the neutron emits an electron.

再来为了平衡电量的改变，中子又释放了一个电子。

In interacting with this force, b mesons would therefore emit electrons and muons at different rates.

因此，在与这种力相互作用时，b 介子会以不同的速率发射电子和 μ 子。