一刻钟怎么说?有的说是 a quarter,有的说是 a quarter of an hour,有的说是 quarter

一刻钟怎么说?有的说是 a quarter,有的说是 a quarter of an hour,有的说是 quarter a quarter of an hour是什么意思? only a quarter of an hour left 英语中a quarter of an hour中的an能换成one吗 a quarter of the students. Fifteen minutes is a quarter of an hour可不可以用Fifteen minutes 1.Even if you're just popping out for a quarter of an hour,d It takes him about a quarter of an hour to walk to the cinem 英语翻译It was about a quarter of an hour after this when Kitty Quarter three quarter of a book为什么quarter没用复数 秦朝经历多少年有的说是14,有的说是15?