pick up on
US /pɪk ʌp ɑːn/
UK /pɪk ʌp ɑːn/

1.
2.
comprendre, assimiler
to understand something after it has been explained or demonstrated
:
•
It took him a while to pick up on the new software.
Il lui a fallu un certain temps pour comprendre le nouveau logiciel.
•
The students quickly picked up on the new grammar rules.
Les étudiants ont rapidement assimilé les nouvelles règles de grammaire.