demarcation [ˌdi:mɑ:rˈkeɪʃn]

例句:

• It was hard to draw clear lines of demarcation between work and leisure.
  在工作和闲暇之间很难划出明确的界限。
  
• Talks were continuing about the demarcation of the border between the two countries.
  关于两国之间边界划定问题的谈判仍在继续。
  
• There is no sharp demarcation between these two types.
  在这两种结构之间,没有明显的分界.
  
• North Korea now claims a more southerly demarcation line.
  来自VOA
• I don't have those lines of demarcation.
  来自WSJ
• March - Border demarcation treaty signed with Russia.
  来自BBC