a breathtakingly expensive diamond的用法和样例：
- The gymnast dared a breathtakingly difficult move.
- Genie,I want the world's most expensive diamond mecklace.Another flash of light,and the woman was holding the precious treasure.And,in the distant place,her husband was looking for a gem broker to buy his latest bonanza.
- This is a breathtaking boxing match. The two men act bravely.
- She wears a diamond ring on her left hand.