The planet's magnetic field is generated by the motion of molten iron flowing around a superhot, solidironcore.
地球内部的熔铁围绕其核心的超高温固体铁核流动,由此产生了地球磁场。
2
The Earth's magnetic field is generated as the molten iron of the Earth's outer core revolves around its solid inner core; when surges in the molten iron occur, magnetic tempests are created.
地球磁场是由地球外核的熔铁围绕固体内核旋转而产生的;当铁水激增,就会发生磁暴。
3
The Earth's solid inner core was formed by the freezing of iron rich liquid materials making up the outer core.