Rishe has kept a certain activity of hers secret from Arnold, but when he appears right in front of her, there's no escaping his notice. Later she learns that Michel believes Arnold fulfills every condition necessary to conduct a particular experiment.
In the past, I was unable to 
convince Professor Michel.
في الماضي، كنتُ عاجزة عن إقناع الأستاذ ميتشيل
Damals gelang es mir nicht,
Professor Michel umzustimmen.
En el pasado no fui capaz
de convencer al profesor Michel.
En el pasado no fui capaz
de convencer al profesor Michel.
Celle que j’étais autrefois
aurait tenté de dissuader Michel.
In passato non sono riuscita 
a convincere il professore Michel.
Na outra vida, não consegui
convencer o professor Michel.
В той жизни я не смогла
переубедить профессора Мишеля.