to improve one’s skill or knowledge
uluchshit' svoi navyki ili znaniya (uluchshit' vashi znaniya ili navyki, kotorye vy uzhe izuchili)
"She decided to brush up on her painting techniques."
"Ona reshila uluchshit' svoi tekhniki risovaniya." (Mne nuzhno **brush up on** moi prezentatsionnye navyki pered bol'shoy vstrechey.)
someone who imitates another person
fixed and not likely to change
to trust or believe in someone or something
to take the lead in a race or competition
to criticize someone angrily
to stay focused on your goal or objective despite obstacles
