a silver wedding anniversary的用法和样例：
- It was the pub landlord's silver wedding anniversary the other day and he gave all his regular customers a drink on the house.
- The couple gave a dinner party in celebration of their silver wedding anniversary.
- My parents were first to take the floor at the dance give to celebrate their silver wedding anniversary.
- My sister was a child bride; she married when she was only seventeen,but next year will be her silver wedding anniversary.