When an ionic crystal dissolves in a solvent, the ions break off from the crystal.

晶体 中的一种缺陷结构，它是由一个阳离子空位和一个阴离子空位组成的空位对。

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Icebergs that break off from glaciers onshore are driven by winds and currents into shallow waters.

近岸冰川脱落下来的冰块被风和洋流推动到浅水区。

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That is because snow and ice melt, or break off from glaciers. They flow into the sea. The increased water makes the sea levels rise.

这是因为冰雪从冰川上消融并流入大海，这些增加的水使得海平面上升。

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Ice is more likely to break off from shore as temperatures rise in spring.

CNN: More than 220 rescued from ice floes off Latvian coast

He said AMFA's 1998 decision to break off from the International Association of Machinists--part of the AFL-CIO--clearly backfired.

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The 750 or so icebergs that break off from glaciers each year and drift south from Greenland are floating masses of freshwater ice formed in the pristine air of 3, 000 B.

FORBES: It's The Tap Of The Iceberg