boundary demarcation of surface mine

例句：

1. 1. The boundary demarcation between the two countries is clear.
   两国之间的边界划分非常明确。
2. 2. The boundary demarcation was done by a team of experts.
   边界划分是由一个专家团队完成的。
3. 3. The boundary demarcation is crucial for the development of the region.
   边界划分对于该地区的发展至关重要。