Ricketts line

例句：

1. 1. The Ricketts line is a crucial part of the construction project.
   里克特线是该项目建设的关键部分。
2. 2.The Ricketts line was used to mark the boundary between two different regions.
   里克特线被用来标记两个不同地区之间的边界。
3. 3.The Ricketts line has been a controversial topic in recent years.
   里克特线近年来一直是争议的焦点。