Business can be conducted during any meal, but lunch is best.

Business can be conducted during any meal, but lunch is best=办事可以在用餐时候进行，不过在午餐是更好 .
Business 并不单之商务、交易，而是任何事务 (会议、讨论、等等)

生意能在吃饭的时间谈成,但是在吃午餐的时候最佳.