In theory, you need molteniron in the core to generate one, but Mercury is so small, its core should have long since solidified.
理论上，你需要核心里的熔化铁来产生它，但是水星很小，它的核心凝固还要很久。
2
The Earth's magnetic field is generated as the molteniron of the Earth's outer core revolves around its solid inner core; when surges in the molteniron 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
That's a lot of work to foreclose on an 8,000-mile-in-diameter ball of molteniron and rock.