τράνταξε το πουλί ενός συμμαθητή του κατά τη διάρκεια μιας διάλεξης

If I send in a bunch of electrons into a hardness box,

here's an important thing.

Well, it sends it into a hardness box,

and I take out the ones that come out soft,

and I send them again into a hardness box,