Vertaling van "impressed by what these young cyclists had accomplished " (Engels → Frans) :

Those they met along the way were very impressed by what these young cyclists had accomplished.
Les gens rencontrés sur leur passage ont trouvé les accomplissements de nos jeunes cyclistes très importants.

One can only imagine what these young women would have accomplished if this tragedy had not occurred.
On ne peut qu’imaginer ce que ces jeunes femmes auraient accompli si cette tragédie n’avait pas eu lieu.