for decades sag and aftra have negotiated such agreements with the amptp jointly, but jurisdictional disputes prompted aftra to proclaim that it would proceed separately this time.
在过去的十几年中,sag和aftra已经有了对诸如与amptp合作协议的谈判,但是由于管辖范围的争论使得aftra宣称这次很可能继续单独进行。