两家公司建立了战略联盟，共同开发新技术。

The two companies formed a strategic ___alliance to jointly develop new technologies.

两国间的军事联盟加强了边境安全。

The military ___alliances between the two countries strengthened border security.

两家公司结成联盟以共同开发新技术。

The two companies formed an ___alliance to develop new technology together.