1、十五的英语：fifteen，读法英 [?f?f?ti?n] 美 [?f?f?ti?n]。

2、公司在最兴隆时期每隔十五分钟就开出一列火车。In its heyday, the company ran trains every fifteen minutes.

3、你家里的电线应该每十到十五年更新一次。The wiring in your house should be renewed every ten to fifteen years.