Fresh snow can melt and re-freeze within the snow pack and it's this change of structure that can lead to an avalanche.

新下的雪可以在积雪中融化再凝固，这种结构上的变化会引起雪崩。

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Methods: TotanshinoneIIA Nano-liposomes were prepared by freeze-melt, reverse phase evaporation and ultrasonic bath-refining-freeze-drying.

分别采用冻融法、逆相蒸发法、超声-匀浆-冷冻干燥法制备丹参酮IIA纳米脂质体。

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Take a metre of powder snow, then melt and freeze, melt and freeze, and after eight to 10 years you have a centimetre of ice.

BBC: The perfect trip: Switzerland

When building on permafrost in northern Quebec, non-profit group Archimede Systems had to take into account the melt-and-freeze cycles of the seasons, the need to insulate heat, prevent condensation, and the necessity to keep the home from melting into the icy ground during a thaw.

FORBES: Arctic Refuge On Stilts--Kangiqsujuaq, Quebec

NASA's scientists have designed a device that would be carefully sterilised, and would then melt its way down through the ice, allowing the melt-water to freeze behind it to prevent contamination.

ECONOMIST: Planetary pretenders