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English definition of “be known to be/do sth”

be known to be/do sth

C1 If something or someone is known to be or do something, people know that it is true or happens, or that someone is or does something: A daily intake of 20 mg of vitamin C is known to be sufficient in most cases to ward off scurvy.
(Definition of be known to be/do sth from the Cambridge Advanced Learners Dictionary & Thesaurus © Cambridge University Press)
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