2个半小时用英语说应该是two and half an hours,还是two and a half hours?

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2个半小时用英语说应该是two and half an hours,还是two and a half hours?

2个半小时用英语说应该是two and half an hours,还是two and a half hours?
2个半小时用英语说应该是two and half an hours,还是two and a half hours?

2个半小时用英语说应该是two and half an hours,还是two and a half hours?
two and a half hours还可以说two hours and a half.

后者正确

用a不用an,因为half的第一个音节不是元音

two and a half hours还可以说two hours and a half。
希望可以帮到你,O(∩_∩)O~

用后面那个

two and half an hour