1·Before it solidified, it was just regular sand.
在凝固之前，它只是普通的沙子。
2·In theory, you need molten iron 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。
3·Most crystalline rocks are much more solid; a common exception is basalt, a form of solidified volcanic lava, which is sometimes full of tiny bubbles that make it very porous.
大部分结晶岩石都非常坚硬，但也有例外，最常见的就是玄武岩，它是一种火山岩浆凝固后的形态，内部充满了微小的气泡，因此也具有多孔渗水的特点。
4·The simulation suggests rocks on the far side come mostly from the smaller moon, which should have previously cooled and solidified faster than the main moon, making its rocks older.
模拟结果指出，远地端的岩石主要来自个头较小的月亮，它们先前冷却和凝固更快一些，所以岩石也更老一些。
5·Once finished, the solidified shape is cleaned of residual slurry and heated in a furnace to sinter the ceramic particles together.
一旦打印完成，便从剩余的陶浆中清理出凝固的物体并在火炉中加热以使陶瓷颗粒固定。