What is exclusive is often scarce and therefore difficult to find.
Attention, this piece is welded and therefore difficult to replace.
Coque arrière de cette pièce est soudée et donc difficile à remplacer.
It is therefore difficult to assess the achievement of this outcome.
They are remarkable because they are experimental and therefore difficult to replicate.
The goals are often hazily defined and therefore difficult to measure.
Les objectifs sont souvent définis de manière floue et donc difficiles à mesurer.
The house is very large and therefore difficult in winter heating.
La maison est très grande et donc difficile dans le chauffage en hiver.
It is therefore difficult under these conditions to make reliable analyses.
Il est donc difficile dans ces conditions, de réaliser des analyses fiables.
This question is therefore difficult to answer in absolute values.
Il est donc difficile de répondre à cette question en valeurs absolues.
All these concrete loads are generally large and therefore difficult to handle.
Toutes ces charges en béton sont généralement volumineuses et donc difficiles à manipuler.
However, these definitions are vague and therefore difficult to apply.
Establishing contact with this specific target group is therefore difficult.
Établir des contacts avec ce groupe cible spécifique est donc difficile.
For clairaudient sleeper it is therefore difficult to sleep there.
Pour dormeur clairaudient, il est donc difficile de dormir là.
It is a complicated reply, and therefore difficult to take on board.
Il s'agit d'une réponse compliquée, et donc difficile à comprendre.