It's mostly rock and ice, but it probably has a liquid iron core.

它大体上由岩石和冰组成，不过多半有一个液态铁核。

Within the iron core, the rotating ball of molten iron generated a remarkable magnetic field.

得益于地球的铁质核心不断旋转对流逐渐产生了地磁场。

They're mostly rock and ice, though Ganymede, the biggest, may have an iron core.

它们大多是岩石和冰构成，最大的木卫三可能有一个铁核。

The Earth has a molten iron core that rotates quickly, turning it into a giant magnet.

地球有一个快速旋转的熔融铁核，把地球变成了一个巨大的磁体。

It's Earth's magnetosphere-the magnetic field created by the movement of the iron core deep within the planet.

这是地球磁层发出的声音，磁层是地球深处铁芯运动产生的磁场。

It has a huge iron core, about which little is known.

它有一个巨大的铁芯，对此知之甚少。

The iron core has no other choice but to collapse, reaching incredibly high densities.

铁芯别无选择，只能坍缩，达到难以置信的高密度。

Each hemoglobin molecule contains four heme groups with iron cores to which oxygen binds.

每个血红蛋白分子包含四个血红素基，铁核与氧结合。

You come across a variety of wheat called iron corn. Yes. Did you come across iron core?

你遇到了一种叫做铁玉米的小麦。是的。你遇到过铁芯吗？

The iron core was no longer able to generate this magnetic field and then the solar wind started pounding the surface of Mars.

铁核不能再产生磁场，接着太阳风开始重击火星表面。

Fortunately, the earth is protected from its radiation by a magnetic shield, a kind of force field generated by our molten iron core.

幸运的是, 地球由于磁屏障而免受辐射, 这是一种由我们的核心产生的磁场力屏障。

Above the Earth's iron core, its rocky mantle was melting forming volcanoes that rose to the surface and burped up noxious gases and lava.

由于炎热的铁核外层的岩石被融化，形成突出地表的火山不断释放有毒气体和火山灰。

The big thing that we remember about the Moon and its composition is that it doesn't have any iron core like the Earth does.

让我们想起月球和她的成分的要紧的事情是她没有地球一样的铁核。

We did some digging, pun-intended, and found that just the solid iron core of our planet would be worth 4.8 sextillion dollars!

我们做了一些挖掘， 双关语，发现仅我们星球的实心铁芯就价值 4.8 六十亿美元！

We know the surface is rocky, so to be as dense as it is it must have a large iron core, far larger in proportion to the planet than Earth's.

我们知道它的表面是岩状物质，所以要达到这样密度，它就一定有一个巨型铁核，且铁核的比例应该要比地球的大得多。

So now you know that you, you have some thing that you want to develop into a brand, but who who's growing iron core, where do you get it?

所以现在你知道你，你有一些东西你想发展成一个品牌，但是谁在种植铁芯，你从哪里得到它？

Silicon fuses into a bunch of different elements, including iron. That inert iron builds up in the core, just like all those elements did before, and just like before the iron core shrinks and heats up.

硅会聚变成一系列不同的元素，包括铁，惰性铁会在地核中聚集，就像之前所有的元素一样，就像在铁核收缩和升温之前一样。

Like it doesn't seem super efficient to start a food retreat and to spend your free time, which probably had almost none teaching just 20 people at a time, had a cook with iron core.

好像开始一次美食静修和度过你的空闲时间似乎不是很有效率，可能几乎没有人一次只教 20 个人， 有一个铁杆厨师。

Naturally occurring magnets aren't powerful enough to lift up huge slabs of steel, but wrap an iron core with wires and run a current through and voila, you can create a powerful electromagnet that can lift cars.

自然产生的磁铁不足以举起巨大的钢板，但用电线包裹铁芯并让电流通过， 瞧，你可以制造一个可以举起汽车的强大电磁铁。