The formation of Earth's crust protected the inner layers of Earth from the high-energy particles in space, reducing the temperatures of the mantle and the core.
地壳的形成保护了地球的内层不受太空中高能粒子的影响,降低了地幔和地核的温度。
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
In the textbooks of yore, the Earth'sinner regions like the mantle and core were presented as simple, fairly homogeneous regions.