Crystals in an unsaturated solution dissolve, with subsequent diffusion away from the solid - liquid interface .

当晶体溶解在不饱和溶液中时, 分子就会在 固液 界面处产生相应的扩散.

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The solid - liquid interface moves away from the heat transfer surface , therefore, it makes phase change problem - linear.

由于相变过程中固液位置不断移动, 使得相变问题具有非线性的特征.

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