a land of opportunity的用法和样例：
- The pontiff praised America as a land of opportunity and hope.
- Xenia Onatopp: It's very different now. A land of opportunity.
- The pontiff praised America as a land of opportunity and hope.He expressed grief that the nation's promise fell short for blacks and Indians.
- Many Mexicans regard the United States as a land of milk and honey.
- Some people wrongly believe that the United States is a land of opportunity, and that everyone enjoys equal opportunities.