Examples of using Difficult to prove in English and their translations into French
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Damages Difficult to Prove.
Financial crime is by nature difficult to prove.
Be difficult to prove in court.
Causality is difficult to prove.
It's difficult to prove, fortunately for you.
                People also translate
            
Collusion is difficult to prove.
The job creation effect of the programme reviewed is difficult to prove.
Racism is difficult to prove.
Such a source of infection, however, is difficult to prove.
Arson is difficult to prove.
The links between them are still difficult to prove.
This is difficult to prove in court.
Discrimination is not difficult to prove.
It is difficult to prove medical negligence.
This link can be difficult to prove.
Just like Newton's binomial formula, this formula is easily conjecturable, butmuch more difficult to prove.
Bad faith is difficult to prove.
Fortresses of roughly the same type are extant in Korea, but only because they have been repaired or restored, either during the Joseon period or in the 20th century, andthus arguments of their similarity to  the Japanese fortresses in question are difficult to prove.
This is also very difficult to prove.
Although it is difficult to prove, investments in quality management usually result in higher chances of success.
Bad faith can be difficult to prove.
The Islamic Republic of Iran, however, maintains that the punishment of stoning for married persons who commit adultery serves as a deterrent, helping to  maintain the strength of the family and society, andthat such charges are, by design, very difficult to prove.
Maybe it's true but difficult to prove.
It is always more difficult to prove that something does not exist than vice versa.
Efficacy is far more difficult to prove.
It can be very difficult to prove if rape was committed.
Indeed, cases of exploitation are difficult to prove.
Otherwise it would be difficult to prove that you gave him the funds.
This last requirement is the most difficult to prove.
This mechanism is difficult to prove in this field.