crack on with something

Từ điển Oxford Advanced Learner 8th

ˌcrack ˈon (with sth) derived
(BrE, informal)to work hard at sth so that you finish it quickly; to pass or continue quickly
•If we crack on with the painting we should finish it today.
•Time was cracking on and we were nowhere near finished.
Main entry: ↑crack_derived