She ran a half mile in a half hour.上面这个句子两个a可以放在half后面吗?

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She ran a half mile in a half hour.上面这个句子两个a可以放在half后面吗?

She ran a half mile in a half hour.上面这个句子两个a可以放在half后面吗?
She ran a half mile in a half hour.
上面这个句子两个a可以放在half后面吗?

She ran a half mile in a half hour.上面这个句子两个a可以放在half后面吗?
she ran half a mile in half an hour
后一个a 变成an