origin of hills

例句：

1. 1.The discovery of the new species is a significant contribution to our understanding of evolution.
   新物种的发现对我们理解进化具有重要意义。
2. 2. The origins of the conflict can be traced back to political differences between the two countries.
   冲突的根源可以追溯到两国之间的政治分歧。
3. 3.The origin of this phenomenon has yet to be fully understood.
   这种现象的起源尚未完全被理解。