deal in
US /diːl ɪn/
UK /diːl ɪn/

1.
commerciare in, trattare
to buy and sell a particular product or type of product
:
•
My uncle deals in antique furniture.
Mio zio commercia in mobili antichi.
•
The company primarily deals in software solutions.
L'azienda si occupa principalmente di soluzioni software.
2.
trattare di, riguardare
to be concerned with or to involve
:
•
The report deals in the latest economic trends.
Il rapporto tratta delle ultime tendenze economiche.
•
His research primarily deals in quantum physics.
La sua ricerca si occupa principalmente di fisica quantistica.