Translating and refining

I'm looking to translate the phrase about the two oldest members taking the ceremonial kick-off at the new Camp Nou and their experience witnessing the stadium's completion in 1957. I want to improve the grammar and proceed with both the Chinese refinement and the English translation. It might be useful to ask what else they'd like, and I could also think about creating some social media post variations while keeping everything concise.

想把这句补完整/润色，还是要英译呢？我先给几个版本，您挑风格：

• 中文标题（精炼）：

  

  • 两位最年长会员为新诺坎普开球，1957年球场落成时亦曾见证揭幕
  • 两位最老会员完成新诺坎普开球仪式，他们在1957年落成时也到场见证
  • 巴萨两位最年长会员为焕新诺坎普开球，曾见证1957年落成

• 中文导语（约40字）：

  • 巴塞罗那俱乐部邀请两位最年长会员担任新诺坎普的开球嘉宾。两人早在1957年球场落成时，便亲历了这一历史时刻。

• 英文翻译：

  

  • The two oldest club members took the ceremonial kick-off at the new Camp Nou; they had also witnessed the stadium’s inauguration in 1957.

需要我写一篇100–150字的新闻简讯、社媒贴文版本，还是按某家媒体的口径统一用词（“诺坎普/坎普诺”）？