cornerstone laying ceremony

例句：

1. 1. The cornerstone laying ceremony marks the official start of the construction project.
   奠基仪式标志着建设项目的正式开工。
2. 2. During the cornerstone laying ceremony, the mayor and other dignitaries attended the event.
   市长和其他政府官员出席了奠基仪式。
3. 3. The cornerstone laying ceremony was a symbolic moment for the community as it marked the beginning of a new era.
   奠基仪式是社区的一个象征性时刻，标志着一个新时代的开始。