a solid business firm的用法和样例：
- We are happy to join forces with a company of Weldon's standing and success in the industry, and we look forward to a solid business relationship.
- The club has made an approach to a local business firm for sponsorship.
- This is all for all, practicality and equipment for commercial design and quality of human nature, laying solid foundation for a solid business.
- We would like have your best CIF HK price, as a token of entering a solid business relationships for long term between both parties.