swot up
US /swɑːt ʌp/
UK /swɑːt ʌp/

1.
恶补, 刻苦学习
to study something very hard, especially for an examination
:
•
I need to swot up on my history before the test.
考试前我需要恶补一下历史。
•
She spent the whole weekend swotting up for her medical exams.
她整个周末都在为医学考试恶补。