In addition, the field poles can be excited by two field windings, a shunt field winding and a series field winding.

除此之外，励磁可以使用两种不同的励磁绕组：并励和串励。

youdao

While aurora are generally only visible close to the poles, severe magnetic storms impacting the Earth’s magnetic field can shift them towards the equator.

虽然极光一般仅在两极附近可见，不过在强烈的磁暴对地球磁场的影响下，极光也会在赤道附近出现。

youdao

While aurora are generally only visible close to the poles, severe magnetic storms impacting the Earth's magnetic field can shift them towards the equator.

虽然极光一般仅在两极附近可见，不过在强烈的磁暴对地球磁场的影响下，极光也会在赤道附近出现。

youdao

The magnetic field forces the particles toward the north and south poles.

CNN: 'Dancing lights' draw thousands to frozen north

The magnets' like poles were facing one another, creating a field which was weakest precisely in the centre of the vial.

ECONOMIST: Monitor