As the world's only truly universal global organization, the United Nations (UN) has become the foremost forum to address issues that transcend national boundaries and cannot be resolved by any one country acting alone.

A. 作为世界上惟一一个真正具有普遍性的世界组织，联合国已经成为首要论坛去处理问题，超越国界、而且任何一个国家都无法独立解决。
B. 作为世界上惟一一个真正具有普遍性的世界组织，联合国已经成为处理超越国界、而且任何一个国家都无法独立解决的问题的首要论坛。