A team of researchers from the University of Nevada recently developed a model for how the gold deposits formed. Their research was published online in the journal Nature Geoscience.

来自内华达州大学的一组研究人员在近期建立了黄金矿床如何形成的模型，而他们的研究被发布在自然地球科学杂志网上。

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Randomised trials, which are the gold standard in medical research, will be tricky to impossible: women are unlikely to accept a researcher's arbitrary instruction about where they should give birth.

医学研究的黄金准则，随机试验的方法，不但没有准头，且也是不可能的：准妈妈们不可能接受研究人员的对她在哪里分娩给出的任意指令。

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The Harvard study falls short of the research 'gold standard', however, because the women reported their aspirin use in questionnaires, rather than going through a controlled clinical trial.

然而，哈佛的这项研究并不符合研究的“黄金标准”，因为妇女是以调查问卷的方式报告她们阿司匹林的服用情况，而不是通过一个可控制的临床试验。

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The study is observational -- meaning the researchers followed people over time -- rather than interventional (say, having some people watch TV and others read a book), which is the gold standard for research proving cause and effect.

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"The smart money is on buying gold" rather than selling, said Mark O'Byrne, research director at gold dealer GoldCore in Dublin.

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But this horde of documents is going to prove a gold mine for academic research.

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