a quick study idiom
US学得快的人
someone who is able to learn new things quickly
He lacked foreign policy experience but was a quick study. 他缺乏外交政策方面的经验，但学得很快。
Netrebko, who is a very quick study when it comes to languages, speaks English with no noticeable Russian accent. 涅特列布科学习语言的速度非常快，她说英语的时候没有明显的俄罗斯口音。