They've broken off their engagement.

他们突然解除了婚约。

I've broken off my engagement to Arthur.

我已经解除了于阿瑟的订婚约定。

She has broken off her engagement to Charles.

她已解除同查尔斯的婚约。

The back section of the plane had broken off.

飞机尾部脱落了。

The two West African states had broken off relations two years ago.

这两个西非国家两年前已终止了关系。