Sometimes it took hours to chip away enough frozen earth to get to unfrozen ground.

有时候破开冻土层得花上几小时时间，才能挖到未上冻的土层。

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The measurements and the results of ice density and unfrozen solution are introduced.

介绍模型冰密度、冰内未冻液体含量的实测方法和结果。

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If you cannot bring them inside, provide adequate, warm shelter and unfrozen water to drink.

如果你不能把它们带到室内，也要提供足够大且温暖的窝和不结冰的水。

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Professor Meier also says the possibility of ships being able to move through newly unfrozen parts of the Arctic could lead to losses of natural resources.

VOA: special.2009.05.05

The ice has preserved many similar items, but the unfrozen life of these artifacts is short.

NPR: History Emerging from the Ice

It provides long and fertile planting seasons on large expanses of unfrozen land essential to feed 8 billion to 9 billion people around the world.

FORBES: Magazine Article

"Despite the obvious logistical challenges of investigating trades involving offshore accounts, we moved swiftly to locate and freeze the assets of these suspicious traders, who now have to make an appearance in court to explain their trading if they want their assets unfrozen, " said Sanjay Wadhwa, senior associate director of the SEC's New York Regional Office.

WSJ: SEC Freezes Swiss Account Used in Trades Ahead of Heinz Deal