五十个常用合成词合成词词性释义例句build-upn.聚集The build-up of carbon dioxide eventually leads to the global warming. cost-savingadj.节约成本的Doing business online is undoubtedly efficient and cost-saving.cure-all n.万能药Some people regard education as the cure-all for all the social problems. double-edgedadj.双刃的Fire is a double-edged sword, bringing not only to human warmth, but also disaster.duty-boundadj.责无旁贷的The government is duty-bound to ensure peace and security
