work at

US /wɜːrk æt/
UK /wɜːrk æt/
"work at" picture
1.

lavorare a, impegnarsi per

to make an effort to achieve or improve something

:
You need to work at your communication skills.
Devi lavorare sulle tue capacità di comunicazione.
They've been working at this problem for hours.
Hanno lavorato a questo problema per ore.