二、quarter of an hour 十五分钟 He was waiting for a quarter of an hour.他等了一刻钟了。
1. 解答: 十五分钟又称一刻钟，对应英文的a quarter一词。
这个时间表达法可以翻译为两种方式: ① nine fifteen 或者 ② a quarter past nine。
2. 拓展: 英语时间表达法根据分针的取值范围，通常有顺读法与逆读法两种。
15minutes 或者a quarter
15 minutes Speeches were limited to 15 minutes each.每次发言限定在15分钟之内。
Surely 15 minutes is enough time for you to have a coffee.你喝杯咖啡15分钟当然足够了.The dancers began to warm up fifteen minute。
15min，它是一个单位，不是英语单词，不能加s