a vast sum of funds的用法和样例：
- We are talking about millions of pounds here and, if we have to pay out a vast sum of money, that will hit our revenue elsewhere.
- "Thir-ty thousand dollars!" the song went on and on. A vast sum, an unthinkable sum!
- I had to spend a large sum of money to get it back.
- He contributed a large sum of money to the fund.