Kub yaj nplaum nplaum yog ib hom yas nplaum, nws nyob rau hauv ib qho kub ntawm nws lub cev hloov pauv nrog qhov kub thiab txias, thaum cov yam ntxwv tshuaj tseem tsis hloov, nws tsis muaj tshuaj lom thiab tsis muaj ntxhiab, yog cov khoom siv tshuaj lom neeg.
Ntawm lawv, kub yaj nplaum nplaum yog siv cov nplaum nplaum kub yaj yog yaj cov nplaum nplaum kub los ntawm tshav kub, thiab cov kua nplaum tom qab melting ua kua. Tom qab ntawd los ntawm kub yaj nplaum raj thiab kub yaj kua nplaum phom ntawm lub tshuab kub yaj nplaum nplaum, nws raug xa mus rau saum npoo ntawm cov khoom sib txuas, thiab cov nplaum kub yaj yog txias kom tiav cov kev sib txuas.
