The tusks are used for defense, and, like teeth, they may wear down or be broken off.

象牙用于防御；和牙齿一样，它们也会磨损，或者脱落。

youdao

An fire alarm in the adjoining building caused the play at the theater to be broken off.

邻楼的失火警报使剧院里上演的戏剧中断。

youdao

Thorns are deeply embedded in the woody structure of the plant and can't be broken off easily.

这些刺都深深地嵌在植物的木纹状组织结构内，不会被轻易破坏。

youdao

All in all, it seems unlikely that Congress will be able to agree on a comprehensive intelligence-reform bill before the election, though parts of it may be broken off and passed separately.

ECONOMIST: Intelligence meets politics | The

Prince has been trying to make things right by shuffling executives and putting a big cost-cutting plan in motion, but that hasn't stopped speculation that the company would be better off broken up into pieces.

FORBES: Weill Springs To Citi's Defense

Your mighty ones to the South will be broken... every man will be cut off by the slaughter...

CENTERFORSECURITYPOLICY: In Egypt, Christians endure their 'Kristallnacht'