界线

• The lane is the boundary of our land .
  那条小路就是我们这片地的界线。
• The fatal limit always stopped travellers .
  旅行家们总是被那道不可逾越的界线阻挡住。
• The terminator is the boundary between day and night .
  地影界线就是白天和黑夜的边界。
• These limits, particularly the upper one, are not very well defined .
  这些界线，不是很严格的，尤其是上线。
• It is important to draw a sharp contrast between isolation and dilution .
  把隔离和稀释两者划清界线是重要的。
• A " boundary " is a precise line marking the outer limits of an area .
  “边界”是标明一个区域外缘的明确界线。
• Nature does not know our carefully prescribed research boundaries .
  大自然本身并不具备人们仔细划定的研究界线。
• She raised between them a barrier impenetrable as a wall .
  她就在他们之间垒起一道不能越过的界线，象一堵墙一般。
• For many people there was no fine partition between art and propaganda .
  对许多人来说，艺术和宣传是划不清界线的。
• Of particular importance to the observer is the position of the terminator .
  对于观测者特别重要的是明暗界线的位置。