Such a relationship is presently unproven.
这种相互关系尚未证实。
There's no such thing as an unproven track record.
未被证实的记录压根就不存在。
This is particularly true with unproven new products.
对于还没有经过市场证明的新产品更是如此。
All other methods of staying awake and alert at the wheel are unproven.
另外一些在开车时保持清醒和警惕的方法都是未经证实的。
The technology is unproven at this scale and would be very expensive.
何况该技术还没有在如此规模下使用的先例，更不用说昂贵的开销了。
Just because the allegations are unproven, however, does not mean they are all false.
不过，这些指控未经证实并不意味着它们就是虚假的。
The risks, he said, were rubbish, unproven by science, while the potential benefits were endless.
他说，未经科学证实的风险不过是垃圾，而潜在的优势则永无止境。
The risks, he said, were rubbish, unproven by science, while the potential benefits were endless.
他说，未经科学证实的风险不过是垃圾，而潜在的优势则永无止境。
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