petrograd standard

例句：

1. 1. The city of St. Petersburgis known for its beautiful architecture and richhistory.
   圣彼得堡以其美丽的建筑和丰富的历史而闻名。
2. 2. The Russian Revolution tookplace in St. Petersburg, acity that played a crucial role in thecountry's development.
   俄国革命发生在圣彼得堡，这座城市在该国的发展中扮演了关键角色。
3. 3. The city of St. Petersburg is home to many famousmuseums and art galleries.
   圣彼得堡拥有许多著名的博物馆和艺术画廊。