Icebergs are created when chunks of pack ice break free and float off into open sea.

当大块积冰断裂、漂浮至远海的时候，冰山就形成了。

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Complimenting someone on their garment is also a great way to break the ice.

赞美别人的衣服也是打破沉默的好办法。

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It made the ice thin. If he stepped there, he might break through the ice into a pool of water.

VOA: special.2010.05.01

Heavy ice can form and break them.

VOA: special.2010.01.12

Freeze dates are defined as the observed period when a lake or river was completely ice-covered, and break-up dates as the last ice break-up seen before the summer open-water phase.

BBC: Ice records reveal warming trend

We saw and heard about the impacts, from slumping land due to the melting of permafrost to hunter stories about the northward migration of species and the challenge that early ice break up poses for transportation.

CNN: Sailing the Northwest Passage: mission accomplished

Temperatures in the Arctic are now even higher than they were then, and a period of renewed ice shelf break-up has ensued since 2002.

BBC: Major ice-shelf loss for Canada