The mat up proved difficult to manage without a good brush.
But those numbers proved difficult to manage.
In the early days that promise proved difficult to keep.
However, funding them from farmers' contributions has proved difficult.
Still, institutional arrangements and finance proved difficult.
Pourtant, les arrangements institutionnels et le financement se sont révélés difficiles.
It has proved difficult to rebuild public trust and confidence.
Il a été difficile de regagner la confiance du public.
Even wastewater treatment has proved difficult in Yemen.
Même le traitement des eaux usées a été difficile au Yémen.
The late stage of the negotiations proved difficult for both parties involved.
La phase finale des négociations s'est avérée difficile pour les deux parties impliquées.
Finding a balanced perspective proved difficult due to the existing skew.
But this point has proved difficult to get across to many.
Mais ce point s'est révélée difficile à faire passer à beaucoup.
This requirement for a special majority has proved difficult to meet.
Cette condition d'une majorité spéciale s'est révélée difficile à remplir.
Navigating through the throng proved difficult, especially with so many distractions around.
However, getting ahold of this kind of data proved difficult.
Or, il s'est révélé difficile d'obtenir ce type d'informations.