You cool it down to room temperature, and as you do, those short strands do the following thing: each one of them binds that long strand in one place, and then has a second half that binds that long strand in a distant place, and brings those two parts of the long strand close together so they stick together.
O racesti la temperatura camerei, si pe masura ce faci asta, ce se intampla e ca fasiile alea scurte, fac urmatorul lucru: fiecare din ele leaga fasia aia lunga in cate un loc, si apoi mai are o jumatate care leaga fasia mare intr-un loc mai indepartat, si aduce acele doua parti din fasia mare aproape una de alta, astfel incat se lipesc.