get at something

Từ điển Oxford Advanced Learner 8th

▪ I. ˈget at sth derived
to learn or find out sth
•The truth is sometimes difficult to get at.
Main entry: ↑get_derived
 
▪ II. ˈget at sb/sth derived
to reach sb/sth; to gain access to sb/sth
•The files are locked up and I can't get at them.
Main entry: ↑get_derived