This technical agreement is made by and between the Buyer(s) and the Seller(s)

问题描述:

This technical agreement is made by and between the Buyer(s) and the Seller(s)
为什么不能直接说成This technical agreement is made between the Buyer(s) and the Seller(s)
by and有什么用?

by 表示Buyer(s) and the Seller(s)是原创者
and表示介词和动词的前后关系并列