Second, melt changes dry snow to wet snow.
其次，融化会把干雪转变成湿雪。
Gallium is solid at room temperature but will melt if held in your hand, caesium (Cs), and francium (Fr) ?the second rarest naturally occurring element, can also be liquid at or near room temperature.
金属镓在室温里是固体状态但是把它放在你的手上它就会融化，金属铯，元素钫这些比较稀有的元素在室温或者接近室温的情况下是液体状态的。
Stefan problem of ice-water mixture is discussed under the condition of the second boundary and heat source accelerating to melt ice.
讨论在第二边界条件和有热源加速冰融化情况下冰水混合物自由边界问题。
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