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BNC: 22670 COCA: 22795
unprovenadjective/ʌnˈpruː.vən/

not having been shown to be good enough or to be able to do something尚未获得证明的

It would be unwise to throw billions at unproven technology.向还未证实可行的技术投入亿万资金是不明智的。
a group of talented but unproven young players一群有才智但还未证明自己能力的队员

not having been shown to be true尚未证实的;未经检验的

Unproven allegations have ruined his career.未经证实的指控毁了他的职业前途。
The suspicion, as yet unproven in court, is that he may have withheld important information.有怀疑称他可能隐藏了重要信息,但这一点尚未获法庭证实。
BNC: 22670 COCA: 22795
BNC: 22670 COCA: 22795
BNC: 22670 COCA: 22795
unproven
Not effective or useful and not working correctly: useless, ineffective, inefficient...
Not definite or based on fact: apparently, supposed, alleged...

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