| 1. | The lane is the boundary of our land .
那条小路就是我们这片地的界线。 |
| 2. | 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。 |
| 3. | The terminator is the boundary between day and night .
地影界线就是白天和黑夜的边界。 |
| 4. | 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。 |
| 5. | 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。 |
| 6. | 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。 |
| 7. | 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。 |
| 8. | 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。 |
| 9. | 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。 |
| 10. | 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。 |
