learn a thing or two

한 수 배우다

HARRY POTTER could learn a thing or two from Britain's number-crunching wizards.

Now they see it

Suddenly, there's a lot more technology about

http://economist.com/britain/2006/02/16/now-they-see-it#:~:text=HARRY%20POTTER%20could%20learn%20a%20thing%20or%20two%20from%20Britain's%20number-crunching%20wizards.%20