Well, with a lot of money, you can cut even the atom into to subatomic particles: protons, neutrons and electrons, but even these little magnets still always have one North and South magnetic pole.

好吧，如果你有很多钱，你甚至可以把原子分成一些亚原子粒子：质子、中子和电子，但即使是这些小磁体，也还是有南北磁极。

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Earth is a very large magnetic field, the magnetic field lines from the North Pole, the Earth's surface into the South Pole.

地球是一个无比巨大的磁场，其磁力线由北极出来，经地球表面而进入南极。

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This means that the magnetic North Pole changes place with the magnetic South Pole.

这意味着磁北极的变化与南极磁场发生。

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Tackling the real North Pole is estimated to take at least four times as long as the magnetic pole, which, at present, is considerably further south.

BBC: Sir Ranulph Fiennes: Up the Pole