Dr Cochran argues that something similar happened to the Ashkenazim. Genes that promote intelligence in an individual when present as a single copy create disease when present as a double copy.

Cochran博士认为，德系犹太人也面临着同样的情况，他们的某些基因如果以单组出现就可以提高智力，一旦以双组出现就会引起疾病。

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I need a copy of the police report on the double.

我急需一份警方报告。

《柯林斯英汉双解大词典》

We just need to copy it to test workstations and double-click it to launch the Reflection window.

我们只需要将配置文件拷贝到测试工作站上并双击测试文件运行 Reflection 窗口。

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This soundtrack mojo will only be applied to the cinema release of a film, so if a player recognizes the pattern, it will know it's not playing a legit copy, and shut down on the double.

ENGADGET: New audio "watermark" copy protection scheme for cinemas in the works

Some 600, 000 Americans have a less severe version caused by one defective copy. (There would be more of the double-gene victims if they didn't die young.) To get its drug approved Isis will need to study 45 patients with the severe two-gene form and a few hundred with the single-gene disease.

FORBES: Degunker

's "I Have a Dream" speech, a photograph, a copy of Francis Crick and James Watson's famous "double helix" scientific paper from 1953 and Shakespeare's 154 sonnets.

WSJ: Scientists Store King Speech, Shakespeare Sonnets in DNA