I suppose that you would agree on her testimony with regard to how much you had drunk, but a toxicologist would have to do the calculation based on your weight, the time it took you to drink your five glasses of alcohol, and so on.
Je suppose que vous seriez d'accord sur son témoignage concernant votre consommation, mais il faudrait qu'un toxicologue fasse le calcul en se basant sur votre poids, le temps qu'il vous a fallu pour consommer vos cinq verres d'alcool, etc.