bone up
phrasal verb with bone verb uk/bəʊn/ us/boʊn/
informal
苦学,专心致志地学
to learn as much as you can about something for a special reason
She boned up on economics before applying for the job. 申请工作前她刻苦攻读了经济学。
英汉双解词典收录81607条英汉双解翻译词条,基本涵盖了全部常用单词的读音、翻译及用法,是英语学习的有利工具。