It only remains to say that I hope you can see , as i can, the vast possibilities for building. One of the grandest humanitarian institutions the world has ever seen for the relief of people everywhere。
参考译文：最后我只想表明一点,我衷心地希望诸位能和我一样，看到其中蕴含的广阔前景。我们有能力在此建立起世界上最宏伟的人道主义机构之一，为世界各地的人们提供救助。
remain 有以下2种用法
【1】remain 系动词用法:结构“主语+系动词remain+表语”
The three men remained silent.这3个人保持着沉默。
The situation remains tense.形势持续紧张。
【2】remain不及物动词用法: 结构“主语+不及物动词remain”
Many of the differences in everyday life remain.日常生活中的许多差异仍然存在。
The wider problem remains.更普遍的问题仍未解决。
备注：网友提供It only remains to say that 属于第2种用法，it为形式主语，不定式to say that 是真正主语， remain为不及物动词用法。
It only remain for me to say goodbye.现在我唯一要做的就是道别了。
It remains to thank the organizers for making this event possible.最后需要感谢组织使这次活动得以成功举办。
It remains to be seen whether her parliamentary colleagues will agree. 她的国会同僚是否同意，现在还无从知晓。
