嗯，虽然举得不错，可这些属于不规则用法，和你下面说的无关。
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送交者: LB 于 2015-01-20, 20:30:22:
回答: LB：是你高明还是 Steven Pinker and Richard Lederer 懂英语？ 由 短江学者 于 2015-01-20, 17:48:10:
名词当形容词在英语里是规则用法，simplified form for efficiency, 一点也不crazy.
Baby powder is the powder to dry baby not to feed guns; food stamp is the stamp to buy food not to send letters.... There is nothing wrong.
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