Noxious behaviors are often difficult to address in a group setting.
European standards are often difficult to understand and keep abreast of.
These kinds of measures are often difficult to cost.
Beginnings are often difficult in the world of work.
Because of their intangible nature, these relationships are often difficult to identify.
Ces liens sont difficiles à répertorier à cause de leur caractère insaisissable.
These techniques are often difficult to find or to put into work.
Ces techniques sont souvent difficiles à trouver ou à mettre en œuvre.
These systems are often difficult to repair and costly to replace.
Ces systèmes sont souvent difficiles à réparer et coûteux à remplacer.
These decisions are often difficult to make and sometimes very controversial.
Ces décisions sont souvent difficiles à prendre et sont parfois très controversées.
These special products are often difficult to obtain on the market.
Ces produits spécifiques sont souvent difficiles à obtenir sur le marché.
Election fraud cases are often difficult to prove without substantial evidence.
Les cas de fraude électorale sont souvent difficiles à prouver sans preuves substantielles.
The first fans and followers are often difficult to get.
Les premiers fans et followers sont souvent difficiles à obtenir.
Road communications between two neighbouring states are often difficult or even impossible.
Les communications routières entre états voisins sont souvent difficiles, voire même impossibles.
Parasitic wasps are often difficult to distinguishing between each other.
Les guêpes parasites sont souvent difficiles à distinguer les unes des autres.