我们已经与邻国签署了一项条约，以限制有害气体排放。

We've signed a ___treaty with neighbouring states to limit emissions of harmful gases.

两国谈判达成了一项和平条约以结束战争。

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

欧盟条约于1993年获得批准。

The ___treaty on European Union was ratified in 1993.