伊朗高级官员：“零铀浓缩”实际上也是一条死胡同。

Group 1 - The core viewpoint of the article is that the concept of "zero uranium enrichment" is viewed by Iranian senior officials as a dead end in negotiations [1] Group 2 - Iranian officials express skepticism about the viability of "zero uranium enrichment" as a solution to ongoing nuclear negotiations [1] - The article highlights the broader implications of this stance on regional stability and international diplomatic efforts [1]