a Blue Ribbon Medal的用法和样例：
- His entry at the fair won a blue ribbon.
- He gave him a blue ribbon and put it on his shirt.
- Well,I'll wrap them up in cellophane and tie the bundle up nicely in a blue ribbon.
- If you see fit, We'll send him to college for another year yet, I'll tie a blue ribbon all around his head, To let the maidens know that he is married.