Examples of using Difficult to predict in English and their translations into Greek
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                        Colloquial
                    
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                        Official
                    
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                        Medicine
                    
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                        Ecclesiastic
                    
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                        Financial
                    
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                        Official/political
                    
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                        Computer
                    
Therefore it is difficult to predict a winner.
Their impact on the European Parliament is difficult to predict.
It is difficult to predict the overall impact.
Weather is sometimes difficult to predict.
It is difficult to predict the course of this disease.
                People also translate
            
Weather is sometimes difficult to predict.
It's difficult to predict how the day will turn out.
What is coming is not difficult to predict.
It is difficult to predict how the disease will progress.
The longer-term impact is difficult to predict.
It is difficult to predict where all this will lead.
Whether they will succeed or not is difficult to predict.
It is difficult to predict the response in any one person.
The natural course of the vitiligo is difficult to predict.
It is difficult to predict how the disease will progress.
Eruptions in Hekla are varied and difficult to predict.
It's difficult to predict how these injuries heal.
The consequences of such stress is difficult to predict.
It's difficult to predict how your disease will progress.
And human behavior can be terribly difficult to predict.
But it is difficult to predict, to  demonstrate.
How long peyronie's disease lasts is difficult to predict.
It is difficult to predict how vascular dementia will progress.
The composition can be variable or difficult to predict.
It is difficult to predict how policy debates will evolve.
However, post-editing efficiency is difficult to predict.
It's difficult to predict which companies will beat expectations.
It proved that storms are still difficult to predict.
Demand is difficult to predict and therefore manage.
Admittedly, some of these storms are difficult to predict.