This phenomenon occurs above the magnetic poles in the Northern and Southern Hemispheres.

这种现象发生在北半球和南半球的磁极之上。

The last polarity reversal took place some 770,000 years ago.

最近一次地磁极性倒转发生在大约77万前。

This phenomenon occurs above the magnetic poles in the Northern and Southern hemisphere.

这种现象发生在北半球和南半球的磁极上方。

The hydrogen then flows toward the white dwarf's magnetic poles.

然后氢气流向白矮星的磁极。

I've gone to the magnetic North Pole on a dog sled.

我坐着雪橇犬拉的爬犁到过北磁极。

Because Earth behaves like it has a giant bar magnet in it, and your compass needle will point north towards Earth's magnetic pole.

因为地球的内部就像有一个巨大的磁铁，而你的指南针会向北指向地球的磁极。

The Pioneer plaque gives a hint in the form of a basic diagram of a hydrogen atom, the magnetic polarity of which flips at regular intervals, with a frequency of 1,420MHz.

先驱牌匾以氢原子基本图的出了一个提示，氢原子的磁极按一定的间隔翻转，频率为1420mhz。

For a better estimate, scientists used more than a decade's worth of Hubble data to track the movement of Uranus's auroras, which helped them zero in on the actual location of the planet's magnetic poles.

为了更精确地估算， 科学家们利用了超过十的哈勃数据来追踪天王星极光的移动，这帮助他们准确定位了该行星磁极的实际位置。

A new study models how a gigantic, morphing blob of liquid iron in Earth's outer core underneath the Canadian Arctic is losing its grip on the North magnetic pole.

一项新研究模拟了加拿大北极下的地球外核中一个巨大变液态铁团如何失去对北磁极的控制。

The deranged needles would mark contradictory directions as we approached the southern magnetic pole, which doesn't coincide with the South Pole proper.

它那乱摇乱晃的针，当船上近不能跟地球的南方相混同的南磁极圈的时候，指出矛盾相反的方向。

But imagine if instead of two poles you had 1 to 10 million. This is what happens on the Sun.

但是想象一下如果你不是只有2极，而是有1百万或1千万个磁极的情景。而太阳上就是这样。

A middle layer of nickel, which gives the bots magnetic polarity, so they can be pulled through wastewater with magnets.

中间的镍层提供磁极性，这样在磁力作用下机器人可以从废水中脱离。

You had a jet of plasma traveling very fast that impacted on the magnetopoles-that's the boundary of our magnetosphere.

移动速度极快的等离子体射流撞击磁极——也就是地球磁层的边界。

The magnetite likely plays a role in orienting sea turtles to Earth's magnetic poles, similar to a compass.

磁铁矿可能在将海龟定向到地球磁极方面起作用，类似于指南针。

Because the needle of a compass is magnetised, it's attracted to the magnetic pole – the points near the North and South Poles where the Earth's magnetic field is concentrated.

因为指南针的指针是有磁性的，所以它被磁极吸引。地球的磁极在北极和南极附近，那里磁力最强。

A second, intensifying blob below Siberia is pulling the pole away.

西伯利亚地下另一个不断加强的液态水团正在将磁极拉远。

Since Earth rotates as a solid, our magnetic field is simple, we have two poles: North and South.

既然地球作为一个固体自转，我们的磁力就很简单，有两个磁极，北极和南极。

" There's clear evidence from the volcanic rocks of a major excursion happening at about 795,000 years ago."

“来自火山岩的明确证据表明，磁极在大约79。5万前发生过一次大偏移。”

On Earth you can use a compass – an instrument with a magnetic needle that moves to point north, that is towards to the magnetic pole – a point near the North or South Poles where Earth's magnetic field is strongest.

在地球上，你可以使用指南针“compass”，即一种带有磁针的仪器。磁针永远指向北方，也就是指向磁极“magnetic pole”。地球的磁极在北极和南极附近，那里磁场最强。

They found that the reversal took about as long as many scientists previously believed it did-just a few thousand years.

他们发现，磁极倒转所需时间与许多科学家之前认为的一样长——只需要几千。