a business suit的用法和样例：
- He is a dapper little salesman in a business suit.
- Wear. He likes to wear a business suit.
- He rolled in wearing a Business suit.
- Wearing a business suit, he looks good now.
- A business suit would be best, but whatever makes you feel comfortable is good.
- They are a bit too casual for your suit. When you wear a business suit, your need a dressier shoe.