During his long meeting with the representatives of the party he was unable to secure any discussion of the delegation’s aims.

【翻译】在与该党派代表的长时间会晤中，他未能促成就代表团的各项目标进行磋商。

secure：及物动词，在本句的意思是 “把…弄稳妥；促成；保证做到；获得” 。

这个词义的英文解释是：

If you secure something that you want or need, you obtain it, often after a lot of effort.

例如：

Federal leaders continued their efforts to secure a ceasefire.

联邦领导人继续争取促成停火协议。

Graham's achievements helped secure him the job. 

出色的成绩帮助格雷厄姆拿下了这份工作。

He secured the release of the hostages. 

他设法促成人质获释。