I have books as many again as you.

我的书比你的多一倍.

《简明英汉词典》

There aren't enough chairs for the meeting we need half as many again.

供开会用的椅子数量不够--需要再增加一半.

辞典例句

I have six here and as many again at home.

我在这有六个,在家还有六个.

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Give me as many again, please.

请给我两倍的东西.

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