“签署的”用英语怎么说？

已签署的协议不可再改动.A signed agreement is not susceptible of change.我正在看附属细则，我可不想签署任何不应该签署的东西。I'm looking at the small print; I don't want to sign anything that I shouldn't sign.谈判人员已经把很多将在地球峰会上签署的协议准备妥当。Negotiato...