a big decision的用法和样例：
- It's a big decision for me, Bill.
- On the last day I made a big decision.
- Morey has a big decision to make this summer.
- It is said that our boss has a big decision to make soon.
- I hope you'll think the matter over.It's a big decision to take.
- It is say that our boss have a big decision to make soon.