这两个国家正在结盟以应对共同的威胁。

The two countries are ___allied to counter the shared threat.

他决定与当地的慈善机构结盟，共同帮助贫困家庭。

He decided on ___allying with the local charity to help poor families together.

在家庭争论中，她选择站在弟弟那边对抗父母的决定。

In the family argument, she ended up ___allying with her brother against their parents' decision.