a sheer rock的用法和样例：
- Whether by design or accident, this headquarters was in a rather idyllic spot on the edge of a bubbling brook beneath the overhanging brow of a sheer rock cliff.
- It's very difficult to climb a sheer cliff.
- A sheer incline, such as the face of a cliff.
- His story was a sheer concoction.
- It is very difficult to climb a sheer cliff.
a sheer rock的相关资料：