assiduous
/əˈsɪdʒuəs/ 66GREsatSomeone who is assiduous works hard or does things very thoroughly. 勤奋的; 坚持不懈的
adjective [原级]刻苦的，勤勉的
Podulski had been assiduous in learning his adopted language.
珀杜斯基曾经勤奋地学习他所选的外语。
单词造句:
Podulski had been assiduous in learning his adopted language.
珀杜斯基曾经勤奋地学习他所选的外语。