Cov khoom siv yog ib hom kev sib nqus sib nqus sib nqus cais tshwj xeeb tsim los kom rov qab sib nqus nruab nrab.Nrog lub computer-simulating tsim, tsim muaj zog sib nqus zog thiab siab gradient sib nqus system, sib nqus qhwv lub kaum sab xis yog 138 ° Cov qauv tsim nyog ntawm cov khoom siv, uas tuaj yeem tsim cov pob zeb hauv av sib xyaw ua ke, zoo kawg li txhim kho tus nqi rov qab ntawm cov khoom siv hlau nplaum.
