historical margins

例句：

1. 1. The study of history is crucial for understanding the past and shaping the future.
   研究历史对于理解过去和塑造未来至关重要。
2. 2. The discovery of a new species in the Arctic could have historic implications for global climate change.
   在北极发现一个新物种可能对全球气候变化有重大影响。
3. 3.The decision to build a new bridge over the river had historic significance for the community.
   决定在河流上建造一座新桥对社区具有历史性意义。