It even has a magnetic field, likely generated by that liquid core.

它甚至有磁场，可能是由液体核产生的。

The motion from its liquid outer core generates a magnetic field.

来自其液体外核的运动产生了一个磁场。

And the biggest surprise a larger lighter and more liquid core than earlier estimates.

最大的惊喜是比先前估计的更大、更轻、液态程度更深的内核。

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。

Many scientists think it's because the Earth's magnetic field is tied to a liquid outer core deep inside the planet.

许多科学家认为这是因为地球的磁场与地球深处的液态外核相联系。

In 2.3 billion years from now, the outer liquid core of Earth will freeze which means that Earth will lose its magnetic field forever.

在距今 23 亿年后，地球外层的液态内核将会冻结，这意味着地球将永远失去它的磁场。

And because that core is separated from the Earth's mantle by a liquid outer core, it allows the inner core to potentially rotate at a different speed from Earth's crust.

由于内地核与地幔之间隔着一层液态的外地核，这使得内地核能够以不同于地壳表面的速度进行旋转。

On the other hand, S waves either disappeared or were reflected back, so he concluded that the depth marked the boundary between a solid mantle and a liquid core.

另一方面，S波要么消失，或者被反射，所以他推断这个深度标示了固态地幔和液态地核的界限。

The internal structure of the Moon is roughly similar to the Earth: it has a solid, iron inner core; a liquid outer core, a thick mantle, and a crust of lighter material on top.

它有一个实心的铁质内核、一个液态的外核、一层厚厚的地幔和一层较轻物质组成的外壳。