random sum peak的用法和样例：
- As corollaries, a class of strong limit theorems for arbitrary function of the random sum of three-order nonhomogeneous Markov chains are obtained.
- A class of strong limit theorems for the random sum of three-variable state touple of three-order nonhomogeneous Markov chains are investigated.
- Soiled dishes were piled at random.
- I had to spend a large sum of money to get it back.
- They clubbed together a large sum.