Translate the following English sentence to French:
"Thirdly, we should not have cooperation or integration of a variable composition, since that would mean a Europe á la carte, that is to say, an ungovernable Europe."
La troisième, éviter l' existence de coopérations ou d' intégrations de composition variable, ce qui signifierait une Europe à la carte, c' est à dire, une Europe ingouvernable.