Monongahela series

例句：

1. 1.The Monongahela River Series is a collection of historical documents about the area's history.
   蒙诺格莱河系列是关于该地区历史的一套历史文献。
2. 2.The Monongahela River Series has been used as a teaching tool in many schools.
   蒙诺格莱河系列被许多学校用作教学工具。
3. 3. The Monongahela River Series is considered one of the most important sources of information on the area's history.
   蒙诺格莱河系列被认为是该地区历史最重要的信息来源之一。