1、18的英语：eighteen，英 [?e??ti?n] 美 [?e??ti?n]。
2、We have reports of about an eighteen percent return and exchange rate, and sales fell off dramatically once word of that got out。我们接到的报告显示，他们大约有百分之十八的退货率和换货率。消息传出去后，他们的销售业绩就大幅下滑。
3、Since that time, the computer industry has not only managed to build programmable computing machines, theyve also outdone themselves by doubling the capabilities every eighteen months or so。从那时起，计算机工业不仅得以建造可编程计算机器，而且还通过每十八个月左右就使能力加倍，从而超越了它们自身。