not having been shown to be good enough or to be able to do something

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

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。