如果它的外层在此时凝固成固体，这个形状的残迹可能还能被保存下来。
If the outer layers of Iapetus froze solid at this time, some remnant of that shape might be preserved.
一旦物质凝固，整个固体基质中，能够有效出现不同孔隙分布情况。
Once the material solidifies, this effectively traps different porosity distributions throughout the solid matrix.
凝固点降低的时候，我们要从液体到固体。
When we're doing freezing point depression, we're going from liquid to solid.
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