one hour和an hour,两个是无差别的吗?如题

one hour和an hour,两个是无差别的吗?如题 是a one-hour ducumentary还是an one-hour documentary more than one hour和more than an hour区别 是less than an hour还是less than one hour? a one -hour还是an one-hour half an hour?half an hour、an hour and a half 、 one and a half hours和one half hour都能表示一个半小时吗? One and a half an hour 和An hour and a half 有什么不同 是half hour还是half an hour? 冠词 an one-hour 还是a one-hour 持续一个小时是last one hour还是last for one hour,还是两个都行 half hour =half an hour half hour half an hour 的意思有和区别? half an hour 与 one half hour区别 an hour one houran hour 与one hour的区别是什么 One hour ago 和one hour later.有什么区别? have one hour to have lunch have (时间长短 例如an hour)to do sth 可以用么?可以是有一小时吃饭 和have an hour for lunch? an hour early 和 an hour earlier 的区别? in an hour和after an hour用法分别是什么 in an hour和within an hour的区别