These moving electrons are called free electrons.

电子可以自由移动，称为 这些移动的电子：电子。

These freely moving electrons are in fact the main reason that metals can conduct heat and electricity so easily.

这些自由移动的电子实际上是金属能够如此容易地导热和导电的主要原因。

And for electrons to start moving, they need to have the right amount of energy to leave their parent atoms and join what's basically a sea of moving electrons.

要让电子开始移动，它们需要具备足够的能量以离开其所属原子，并融入大量自由移动的电子。

It's also  interesting to note that the physics of magnetic fields deflecting moving electrons, called the  Lorentz Force, is the driving principle behind all electric motors, just with coils of wires  and different configurations of magnetic fields.

同样有趣的是， 磁场偏转移动电子的物理原理，称为洛伦兹力， 是所有电动机背后的驱动原理，只需线圈和不同配置的磁场即可。