两国签署了一项贸易条约以促进双边合作。

The two countries signed a trade ___treaty to boost bilateral cooperation.

两国签署了和平条约以结束战争。

The two countries signed a peace ___treaty to end the war.

两家公司签署了一份协议来共同开发新产品。

The two companies signed a ___treaty to jointly develop new products.