a matter of great importance的用法和样例：
- It's a matter of no great import.
- You may know that time of delivery is a matter of great importance to us.
- This is a matter of great moment.
- To set up and strengthen the control organs of the Party at different levels is a matter of great importance for the struggle against unhealthy tendencies within the Party.
- Cost of heating a home does not matterto someone with a lot of money, but for families with low incomes, it is a matter of great importance.