1. 电子商务 electronic commerce造句练习:在数字时代,电子商务在经济领域扮演着越来越重要的作用。参考答案:In digital era, electronic commerce plays an increasing role in the field of . 投资 investment造句练习:按照国际惯例,在一个国家教育投资应该占其国民生产总值的4%。参考答案:In line with international convention, education investment in a country should account for 40 percent of Gross Domestic Product (GDP for short).3. 购买力 purchasing power造句练习:经济的发展使国民的购买力大幅提升,从而有更多的钱用于教育、旅游、日常开销等。参考答案:Economic growth brings citizens greater purchasing power which makes it available for them to cover education, travel,daily expenses and so . 消费 v. consume ;n. consumption造句练习:在人们生活水平大幅提高的今天,更要倡导理性消费。参考练习:Today while living level are greatly advanced, rational consumption should be advocated even more.