a long sandstone cliff的用法和样例：
- Hidden at the end of a long ravine, the buildings of Petra, Jordan, were carved into sandstone cliffs by the Nabataeans around 312 B.C.
- There was a long lag in forwarding mail to us.
- Fruit juices ferment if they are kept a long time.
- The beggar spun a long yarn about his misfortunes.
- It was a long trudge up the hill.