assiduous

adj

1. marked by care and persistent effort

e.g. her assiduous attempts to learn French
assiduous research
sedulous pursuit of legal and moral principles

Synonym: sedulous

1. 刻苦的；勤奋的；兢兢业业的
Someone who is assiduous works hard or does things very thoroughly.

e.g. ...an assiduous student...
勤勉的学生
e.g. Podulski had been assiduous in learning his adopted language.
波多斯基一直很努力地学习外语。

1. 勤勉的：arduous#峻险的;困难的 | assiduous#勤勉的 | audacious#大胆的

2. 聚精会神：abroad 出国 | assiduous 聚精会神 | torpedo 鱼雷

3. 勤奋的：employee 雇员 | assiduous 勤奋的 | insidious 阴险的,狡诈的

4.

4. 刻苦的：venture冒险,下决心做 | assiduous刻苦的 | subside下限,降低;如做;消退,平息