Examples of using Difficult to verify in English and their translations into French
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                        Official
                    
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                        Colloquial
                    
Really difficult to verify.
This has also been the most difficult to verify.
It is difficult to verify.
This is currently very difficult to verify.
Looks difficult to verify.
                People also translate
            
However, this hypothesis is difficult to verify.
Difficult to verify for a reason?
This may be difficult to verify.
The legends of Maria's cold-blooded exploits are difficult to verify.
They're also difficult to verify.
It is difficult to verify a person's identity by electronic means.
Some of them are difficult to verify.
Equally difficult to verify is the source of these alerts.
These reports are difficult to verify.
It is difficult to verify such claims independently.
All these grounds are difficult to verify.
A figure difficult to verify, according to  the site verification of facts Politifact.
And this is also not difficult to verify.
Several delegations said that, while they might support the idea of identifying substances classified on the basis of human experience by a special provision,they were firmly opposed to  the proposed addition which would mean allowing the chemical industry to  decide for itself on exemptions of substances duly identified as dangerous goods in the list on the basis of test reports whose authenticity would be difficult to verify.
Details were difficult to verify.