Firms are now studying how genes interact, looking for correlations that might be used to determine the causes of disease or predict a drug's efficacy.

公司正在研究基因是如何相互作用的，以此寻找可用来判断疾病的起因或者预测药物功效的基因相关性。

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For this reason and because of the apparent lack of recent oceans and life on Mars, it should be simpler to determine the causes and history of climate changes on Mars.

基于这个原因，另外因为火星上明显没有海洋和生命，要确定火星上气候变化的原因和历史应该不难。

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So how can you determine which ailment you have? Here's some information about causes and treatment that might help.

那么到底如何判断自己得了哪一种呢？我们在这里提供一些关于病因和治疗方法的信息，希望有所帮助。

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The survey wasn't designed to determine causes but is useful in assembling a "more complete picture of autism" and in helping communities plan services for children, said Coleen Boyle, director of the CDC's National Center on Birth Defects and Developmental Disabilities.

WSJ: Autism Diagnoses Up Sharply

Last month, the National Transportation Safety Board said federal investigators had not been able to determine the causes of fires in two plane batteries or the electrical shorts that occurred.

CNN: STORY HIGHLIGHTS

The trial will determine the causes of the spill, and assign responsibility to the parties involved, including BP, Halliburton, Transocean, and Cameron, which manufactured the blowout preventer meant to stop oil leaks.

BBC: BP: Gulf of Mexico oil spill 'shared responsibility'