If you finalize something such as a plan or an agreement, you complete the arrangements for it, especially by discussing it with other people.
例句
Negotiators from the three countries finalized the agreement in August...8 月里三国谈判人员最终敲定了协议。We are saying nothing until all the details have been finalised...在所有细节最后确定下来之前我们无可奉告。