Examples of using Difficult to verify in English and their translations into Portuguese
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                        Official
                    
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                        Colloquial
                    
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                        Medicine
                    
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                        Financial
                    
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                        Ecclesiastic
                    
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                        Ecclesiastic
                    
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                        Computer
                    
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                        Official/political
                    
Such interpretations are speculative, however, and difficult to verify; breaching in large marine animals such as whales
This hypothesis was difficult to verify due to  the observational difficulties of establishing what was happening inside a dense dark cloud that obscured all visible light emitted from within it.
hypotheses which are difficult to verify.
although still very difficult to verify that at least in some cases,
it is difficult to verify whether only the extract was used
Without this, it was difficult to verify the feasibility of a genome being compromised with malicious information in such a way that, if synthesized,
it is also difficult to verify clearly when its final phase starts.
a practice that makes it difficult to verify their accomplishments- or even their identities.
it isn't difficult to verify that the projection of the torus is not only homeomorphic to  a torus
a fact difficult to verify empirically but perhaps it involves altered states of consciousness induced by fasting
were always inconclusive and very difficult to verify, and failed to  convince the principal researchers of the time;
in the event of derogation from the rules for local transport it is very difficult to verify compliance with the“four Altmark criteria” since the assessment of the fourth criterion is particularly unsuited to  the specific characteristics of the sector.
in any event, difficult to verify.
the figures which are circulating for the number of famine victims are all estimates which are very difficult to verify.
ones which are difficult to verify.
Throughout the preceding period, it proved difficult to verify properly the amounts of¡ncome declared by families with dependent students
It has been difficult to verify some of these aUegations, partly,
In the case of the Shakespearean Polonius, it is not difficult to verify how much his advice is tied solely to  the circumstances of the private life of royalty.
for otherwise these areas would be difficult to verify.