短語詞組短語Contract Incidental Obligation 合同附隨義務pre -contract obligation 先合同義務Realize the contract obligation 履行項目職責system of contract obligation 合同責任制度family contract obligation system 家庭聯產承包責任制the preceding contract obligation 先合同義務post -contract obligation 后合同義務extended contract obligation 擴延合同義務 返回 contract obligation