one reason that gold was so widely used as money was that go
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不是as as句型,要分开理解就明白了one reason that gold was so widely used as money/// was that/// gold as a metal was in univerasl demand ,that is,was generally acceptable 句子的意思是 金子被当做钱来用的一个原因是,金子本身作为金属需求广泛,也就是,它被广泛的介绍