On Earth, heat from the solid inner core drives complex fluid dynamics through convection in the planet's molten outer core, causing an electrical charge which generates a global magnetic field.
They also suspect a fluid outer core generates the planet's magnetic field though convection.
他们还怀疑流体外核产生的磁场领域通过对流。
3
In contrast to the cathedral-building style of the Emacs C core and most other GNU tools, the evolution of the Lisp code pool was fluid and very user-driven.