She had a habit of breaking off her sentences in the middle.

她习惯一句话说到中间就顿住。

We can't solve a problem by breaking off a friendship. It's unfair.

我们不能以中断友情来解决问题，这样对朋友不公平。

Calving: the breaking off of an iceberg from a glacier or ice shelf.

冰裂：冰山从冰川或冰架上断裂下来。

This avoids the carbide drill bits from breaking off the blades at impact.

这样就避免了硬质合金钻头在接触钻孔表面时受撞击而损毁刀锋。

Some of those incidents were merely a wing mirror breaking off or a dented bumper.

这些事故中有一些不过是后视镜撞掉或者保险杠受损之类的小问题。