Vertaling van "pièces du puzzle semblent difficiles " (Frans → Engels) :

On a l’impression que non seulement les pièces du puzzle semblent difficiles à ajuster, mais aussi que certaines d’entre elles manquent.
It does rather give the impression that not only are the pieces of the puzzle difficult to put together, but also that some of them may well be missing.

Nous essayons d'assembler les pièces d'un puzzle très difficile.
It is a very difficult jigsaw that we are trying to put together.