| 1. | Their own contentiousness is a natural obstacle to any " Khomeintern ."
|
| 2. | Existing political borders are often a formalization of these historical, natural obstacles.
|
| 3. | This was due to thick forests and other natural obstacles in valleys.
|
| 4. | There are natural obstacles on both sides that narrow down towards the English.
|
| 5. | Natural borders are geographical features that present natural obstacles to communication and transport.
|
| 6. | Walkways bend and curve, not to avoid natural obstacles, but to be cute.
|
| 7. | Each race has around 12 man-made and natural obstacles that runners must overcome.
|
| 8. | Estonia had a good position-two big lakes were useful natural obstacles.
|
| 9. | Natural obstacles ( called " hazards " ), are marked on the trails.
|
| 10. | Where such natural obstacles do not exist, artificially similar obstacles take on added significance.
|
