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effective
efficace
effectively
efficacement
effectiveness
l’efficacité
efficient
efficace
efficiently
efficacement
efficiency
l’efficacité (personnes, choses)
efficacy
l’efficacité (choses, actions)
efficacious
efficace
efficaciously
efficacement
effectual
efficace
effectually
efficacement
ineffective / inefficient
inefficace
ineffectiveness / inefficiency
l’inefficacité
an effective / efficient teacher / cure / tool
un professeur / remède / outil efficace
to become effective
entrer en vigueur
an efficacious drug
un médicament efficace
effectual measures
des mesures efficaces
this treatment is efficacious in cases of fever
ce traitement est efficace dans des cas de fièvre
she is efficient at her job
elle est efficace dans son métier
no matter how well-prepared you are / however well-prepared you may be, the worst still happends sometimes
on a beau être bien préparé, le pire se produit quand même quelquefois
however hard he tried / try as he might, he could not do it
il a eu beau essayer, il n’y est pas arrivé
it works
ça marche
it doesn’t work
ça ne marche pas
