史无前例

例句：

1. 1.The discovery of the first atomic bomb was a historic event.
   第一次原子弹的发现是一个历史性的事件。
2. 2. This museum is dedicated to preserving the historic buildings and landmarks in the area.
   这个博物馆致力于保存该地区的历史建筑和地标。
3. 3. Historic sites are often preserved for future generations to appreciate.
   历史遗址通常被保留下来，让未来的一代去欣赏。