But their main disadvantage is that they are extremely difficult to repair.
The causes of the troubles are extremely difficult to establish.
Sometimes criteria are imposed that are extremely difficult for us to meet.
In this field the effects are extremely difficult to determine.
Grey market goods are extremely difficult to detect in a marketplace.
You get plans that are extremely difficult to build.
Underground trafficking organizations are extremely difficult to uncover and expose.
Les organisations de traite clandestines sont extrêmement difficiles à repérer et à exposer.
Living conditions in the camps are extremely difficult and unsafe.
Les conditions dans les camps sont extrêmement difficiles et dangereuses.
The heavy metals are extremely difficult to remove from the bitumen.
Les métaux lourds sont extrêmement difficiles à retirer du bitume.
Mineral deposits are rare occurrences that are extremely difficult to find.
Les gîtes minéraux sont des occurrences rares qui sont extrêmement difficiles à trouver.
Highly concentrated moving nonlinearities are extremely difficult to solve numerically.
Les non-linéarités mobiles très concentrées sont extrêmement difficiles à résoudre numériquement.
Living and working conditions in the bateyes are extremely difficult.
Les conditions de travail et de vie dans les bateyes sont extrêmement difficiles.
Human vision and perception are extremely difficult to imitate.
Imiter la vision et la perception humaines est extrêmement difficile.