an hour and a half或者 one and a half hours two hours and a half/two and a half hours 用is,因为时间不可数,虽然小时可数:离天亮还有两个半小时.It was two and one-half hours to dawn.你的展示预定在一个半小时之后开始.Your demo is scheduled to start in an hour and a half.世海明天要/会学中文学一个半小时.Tomorrow Shihai will study Chinese for one and a half hours.
一小时 an hour
576小时 576 hours英 [ˈauə] 美 [aʊr] n. 小时,钟头; 时间,时刻; 固定时间; 课时;
half an hour 一个半小时 one and a half hour
one hour 一小时
＂每小时＂ ＂ per hour ＂ ＂ every hour＂ ＂ each hour＂
for an hour/last an hour 例句:He have been here for one hour He remained this pisition lasting one hour 满意请采纳