expense/expensive

expense /iksˈpens/ n. 1.花费，费用(总称［u］): The expense of living is immense. 生活开销很大。The expense of a good education is great. 接受良好教育费用很高。at the expense of ...以…为代价：［考句］ Many manufacturers were accused of concentrating too heavily on cost reduction, often at the expense of the quality of their products.许多制造商因为过分注重降低成本而牺牲了产品质量遭到批评。2.［c］费用，(花)一笔钱(常用pl.)： My expenses are heavy just now. 现在我的花费很高。 

expensive /iksˈpensiv/ adj.昂贵的: It is too expensive for me to buy.这东西太贵了，我买不起。 Her suit looked extremely expensive.她的套装看上去极为昂贵。I found the food very expensive.我发现食物很贵。