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ha dimostrato che

has demonstrated that

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phrase Rare #40,245
has demonstrated that Used to introduce something that has been shown or proven. The subject can change the verb form: hai dimostrato che means “you have demonstrated that,” while hanno dimostrato che means “they have demonstrated that.”
IT: La ricerca ha dimostrato che dormire bene è importante.
EN: The research has demonstrated that sleeping well is important.

Geeta ha dimostrato che non accetterà una sconfitta tanto facilmente.

Geeta has shown that she will not accept defeat so easily.

— Dangal (2016)