1、The negotiations involve a tripartizan committee representing the government, the opposition, and the international community.
这次谈判涉及一个由政府、反对派和国际社会组成的三方委员会。

2、The tripartizan agreement aims to promote cooperation and stability among the three countries.
这项三方协议旨在促进三个国家之间的合作与稳定。